Maureen (Best voted) Flashcards
A user's laptop is unable to keep a stable network connection. Which of the following measures would MOST likely need to be configured? A. SSID name B. WAP encryption strength C. WAP radio power D. Channel overlay
C. WAP radio power
WAP radio power is the signal strength through which you can specify the range from which you can stay connected to the network and access internet. Here, when the user is not able to maintain a stable connection then it is a problem with the signal strength for sure so you can try to increase the signal strength by increasing the radio power.
The Network Interface Layer of the TCP/IP model corresponds to which of the following layers of the OSI model? (Select TWO). A. Network B. Session C. Transport D. Physical E. Data link
D. Physical & E. Data link
The network layer is responsible for packet forwarding including routing through intermediate routers, whereas the data link layer is responsible for media access control, flow control and error checking.
In which of the following layers of the OSI model would MAC addressing be found? A. Network B. Application C. Data Link D. Transport
C. Data Link
The ITU-TG.hnstandard, which provides high-speed local area networking over existing wires (power lines, phone lines and coaxial cables), includes a complete data link layer which provides both error correction and flow control by means of aselective repeatSliding Window Protocol.
Several users from the finance department report that they are able to access the Internet, but unable to connect to their financial applications. The network technician is unable to ping the finance server. The technician decides to check the switch and determines that Internet access is working. Which of the following is a possible cause of the access issues? A. Faulty cable B. Remote management disabled C. Improper VLAN assignment D. Mismatched duplex
C. Improper VLAN assignment
Finance Server is placed in same VLAN which is assigned to finance users if they are able to access internet that’s means connectivity to switch is good, so we have to check the VLAN assigned to users.
A technician needs to ensure that traffic from a specific department is separated within several switches. Which of the following needs to be configured on the switch to separate the traffic? A. Duplex settings B. SNMP string C. VLAN assignments D. Spanning tree
C. VLAN assignments
A VLAN is a group of end stations with a common set of requirements, independent of physical location. VLANs have the same attributes as a physical LAN but allow you to group end stations even if they are not located physically on the same LAN segment.
Given a subnet mask of 255.255.255.0, how many usable IP addresses would be in that subnet? A. 250 B. 254 C. 255 D. 256
B. 254 TheSubnet Maskhowever, determines the "class" of a Network. 255.255.255.0 is a "Class C" network. A class C network can host up to 254 pc's
On which of the following OSI model layers would a MAC address be used? A. Network B. Data Link C. Transport D. Physical
B. Data Link
The ITU-TG.hnstandard, which provides high-speed local area networking over existing wires (power lines, phone lines and coaxial cables), includes a complete data link layer which provides both error correction and flow control by means of aselective repeatSliding Window Protocol
Joe, a user, has a computer that has a link light on his network interface card (NIC); however, Joe is unable to access the Internet. Which of the following is the cause othis issue? A. Faulty GBIC B. Faulty SFP C. Cable is a crossover D. VLAN mismatch
D. VLAN mismatch
As user has link light on NIC that means he has connectivity with switch so he need to check his vlan assignment
A network technician is troubleshooting signal problems with certain WAPs in an office and finds consistently high ping times across the units. Such an issue is called which of the following? A. Latency B. Attenuation C. Crosstalk D. Frequency hopping
A. Latency
During the high ping time users are using most of the bandwidth that causes latency so signal strength get affected by this.
Which of the following TCP/IP model layers does the OSI model Presentation layer map to? A. Transport B. Internet C. Application D. Network Interface
C. Application
TheApplication layerprovides applications the ability to access the services of the other layers and defines the protocols that applications use to exchange data. There are many Application layer protocols and new protocols are always being developed
A customer wants to keep cost to a minimum and has only ordered a single static IP address from the ISP. Which of the following must be configured on the router to allow for all the computers to share the same public IP address? A. VLANs B. PoE C. PAT D. VPN
C. PAT
Port Address Translation (PAT), is an extension to network address translation (NAT) that permits multiple devices on a local area network (LAN) to be mapped to a single public IP address. The goal of PAT is to
conserve IP addresses.
Which of the following LAN technologies is used to provide a MAXIMUM bandwidth of 1Gbps through singlemode fiber? A. 10GBaseLR B. 100BaseFX C. 100BaseTX D. 1000BaseX
D. 1000BaseX
1000BaseX identifies various Gigabit Ethernet physical layer standards as defined in IEEE802.3z, such as 1000BaseLX, 1000BaseSX, 1000BaseCX and 1000BaseLH. Basically, all standards included in 1000BaseX uses 8B/10B coding scheme with 8 bits of data and 2 bits of error correction data. Each specification allows various cable (fiber or copper) lengths, and uses different cable media.
Which of the following properties of DHCP would a technician use to ensure an IP address is not leased outfrom the active scope? A. Reservations B. Lease times C. Removing IPs from the active leases D. Configuring the DNS options
A. Reservations
Reservationsare permanent lease assignments that are used to ensure that a specified client on a subnet can always use the same IP address. You can use DHCP reservations for hosts that require a consistent IP address, but do not need to be statically configured.
Spanning-Tree Protocol is used with which of the following network devices? A. Router B. NIC C. Switch D. DHCP server
C. Switch
Spanning Tree Protocol (STP) is a Layer 2 protocol that runs on bridges and switches. The specification for STP is IEEE 802.1D. The main purpose of STP is to ensure that you do not create loops when you have redundant paths in your network. Loops are deadly to a network.
A technician wants to separate networks on a switch. Which of the following should be configured to allow this? A. VLAN B. Trunking C. Spanning tree D. Traffic filtering
A. VLAN
A VLAN is a group of end stations in a switched network that is logically segmented by function, project team, or application, without regard to the physical locations of the users. VLANs have the same attributes as physical LANs, but you can group end stations even if they are not physically located on the same LAN segment.
A user wants to connect seven PCs together for a game night. Which of the following should the user install to help with this task? A. Media convertor B. Switch C. Firewall D. Bridge
B. Switch
They connect multiple PCs, printers, servers and other hardware. Switches allow you to send information, such as email, and access shared resources, including printers, in a smooth, efficient, and transparent manner.
Which of the following defines the amount of time a host retains a specific IP address before it is renewed or released? A. DHCP lease B. DNS suffix C. Subnet mask D. DHCP reservation
A. DHCP lease
By default, each IP address assigned by a DHCP Server comes with a one-day lease, which is the amount of time that the address is valid.
Users are reporting that some Internet websites are not accessible anymore. Which of the following will allow the network administrator to quickly isolate the remote router that is causing the network communication issue, so that the problem can be reported to the appropriate responsible party? A. Ping B. Protocol analyzer C. Tracert D. Dig
C. Tracert
Tracet command will tell the administrator which route is not present or which is present so he will come to know whether he has appropriate route or not.
Ann, a new user, has a workstation that has connectivity to the printer located in her department, but cannot access the Internet. The result of an ipconfig command on Ann's workstation is as follows: IP address: 192.168.0.124 Subnet Mask: 255.255.255.128 Default Gateway: 192.168.0.254 Which is MOST likely preventing the user from accessing the Internet? A. Duplicate IP address B. Incorrect gateway C. Incorrect VLAN D. Bad switch port
B. Incorrect gateway
We usually give default gateway as an end device which is directly connected with ISP so in this case user has lost his connectivity with due to wrong default gateway configured.
Which of the following is the common port used for IMAP? A. 25 B. 53 C. 143 D. 443
C. 143
The Internet Message Access Protocol (commonly known as IMAP) is an Aplication Layer Internet protocol that allows an e-mail client to access e-mail on a remote mail server. The current version, IMAP version 4 revision 1 (IMAP4rev1), is defined by RFC 3501. An IMAP server typically listens on well-known port 143
Which of the following network protocols is used to resolve FQDNs to IP addresses? A. DNS B. FTP C. DHCP D. APIPA
A. DNS
An Internet service that translates domain names into IP addresses. Because domain names are alphabetic, they’re easier to remember. The Internet however, is really based on IP addresses. Every time you use a domain name, therefore, a DNS service must translate the name into the corresponding IP address. For example, the domain name www.example.com might translate to198.105.232.4.
Which of the following network protocols is used to transport email between servers? A. IMAP4 B. POP3 C. SNMP D. SMTP
D. SMTP
While electronic mail servers and other mail transfer agents use SMTP to send and receive mail messages, user-level client mail applications typically use SMTP only for sending messages to a mail server for relaying
Ann, a technician, installs a new WAP and users are able to connect; however, users cannot access the Internet. Which of the following is the MOST likely cause of the problem?
A. The signal strength has been degraded and latency is increasing hop count.
B. An incorrect subnet mask has been entered in the WAP configuration.
C. The signal strength has been degraded and packets are being lost.
D. Users have specified the wrong encryption type and routes are being rejected.
B. An incorrect subnet mask has been entered in the WAP configuration.
Users have reported issues accessing an Internet website. The network technician wants to verify network layer connectivity. Which of the following tools can provide the verification? A. ping B. netstat C. route D. arp
A. ping
Pingis a computer network administration utility used to test the reachability of a host on an Internet Protocol (IP) network and to measure the round-trip time for messages sent from the originating host to a destination computer.
Which of the following is the FASTEST Ethernet technology? A. 10GBaseSR B. 10BaseT C. 100BaseFX D. 1000BaseT
A. 10GBaseSR
10GBASE-SR (“short range”) is a port type for multi-mode fiber and uses 850 nm lasers. Its Physical Coding Sublayer 64b/66b PCS is defined in IEEE 802.3 Clause 49 and its Physical Medium Dependent PMD in Clause 52. It delivers serialized data at a line rate of 10.3125 Gbit/s.
Network upgrades have been completed and the WINS server was shutdown. It was decided that NetBIOS network traffic will no longer be permitted. Which of the following will accomplish this objective? A. Content filtering B. Port filtering C. MAC filtering D. IP filtering
B. Port filtering
TCP/IPport filteringis the practice of selectively enabling or disabling Transmission Control Protocol (TCP) ports and User Datagram Protocol (UDP) ports on computers or network devices. When used in conjunction with other security practices, such as deploying firewall software at your Internet access point, applying port filters to intranet and Internet servers insulates those servers from many TCP/IP-based security attacks, including internal attacks by malicious users.
Companies trying to cut down on constant documentation of IP addresses could use which of the following? A. Longer lease times B. More reservations C. Larger scopes D. Dynamic IP addressing
D. Dynamic IP addressing
In Dynamic IP addressing all the hosts with private ip address will be patted to the same ip so the administrator will not have to keep track of each and every host with private ip mapped to a static public ip address
Which of the following DHCP properties defines the size of the pool of available IP addresses? A. Options B. Scope C. Leases D. Reservations
B. Scope
A range of IP addresses that are available to be leased to DHCP clients by the DHCP Server service.
Which of the following protocols works at the LOWEST layer of the OSI model? A. L2TP B. PPTP C. ISAKMP D. IPSec
A. L2TP
Layer Two Tunneling Protocol (L2TP) is an extension of the Point-to-Point Tunneling Protocol (PPTP) used by an Internet service provider (ISP) to enable the operation of a virtual private network (VPN) over the Internet.
An employee connects to a work computer from home via the built-in Windows remote desktop connection. Which of the following is MOST likely being used to establish the connection? A. RDP B. RTP C. RIP D. RAS
A. RDP
Remote Desktop Protocol(RDP) is a proprietary protocol developed by Microsoft, which provides a user with a graphical interface to connect to another computer over a network connection. The user employs RDP client software for this purpose, while the other computer must run RDP server software.
Discover, Offer, Request, and Acknowledge are the steps for which of the following protocols? A. DNS B. DOS C. DHCP D. DSL
C. DHCP
when we install a dhcp server into our network then dhcp server works on the basis of dora process first dhcp server sends a hello message in to the network to discover the clients pc and when any client pc found in the network then, dhcp server offers the IP to client pc. When client pc selects any IP from dhcp server then client pc request for selected IP to dhcp server then dhcp server provide that IP to client pc and both send ackonledgement to each other.
Which of the following commands displays the routing table on a server or workstation? A. nbtstat B. route C. traceroute D. nmap
B. route
Theroute commandallows you to make manual entries into the network routing tables. The route command distinguishes between routes to hosts …
At which of the following layers of the OSI model does ASCII work? A. Session B. Transport C. Presentation D. Application
C. Presentation
The presentation layer is responsible for the delivery and formatting of information to the application layer for further processing or display. It relieves the application layer of concern regarding syntactical differences in data representation within the end-user systems. An example of a presentation service would be the conversion of
an EBCDIC-coded text computer file to an ASCII-coded file.
Which of the following uses port 23 by default? A. TELNET B. IMAP C. FTP D. SNMP
A. TELNET
Telnetis a network protocol used on the Internet or local area networks to provide a bidirectional interactive text oriented communication facility using a virtual terminal connection. User data is interspersed in-band with Telnet control information in an 8-bit byte oriented data connection over the Transmission Control Protocol (TCP).
Assigning the same IP address to a network device is which of the following? A. SSID B. Scope C. Reservation D. Lease
C. Reservation
You might want to assign network printers and certain servers DHCP reservations to ensure that they always have the same IP address, but continue to receive updated configuration information from the DHCP server. For example, create reservations for servers that must always have the same IP address.
At which of the following layers do frames exist? (Select TWO). A. OSI model Data link layer B. TCP/IP model Network Interface layer C. OSI model Physical layer D. OSI model Network layer E. TCP/IP model Internet layer
A. OSI model Data link layer &
B. TCP/IP model Network Interface layer
The data link layer is concerned with local delivery of frames between devices on the same LAN. Data-link frames, as these protocol data units are called, do not cross the boundaries of a local network. Inter-network routing and global addressing are higher layer functions, allowing data-link protocols to focus on local delivery, addressing, and media arbitration. In this way, the data link layer is analogous to a neighborhood traffic cop; it endeavors to arbitrate between parties contending for access to a medium, without concern for their ultimate
destination.
A user is unable to access any network resources. The IP configuration of the workstation is as follows:
IP Address: 192.168.10.32
Subnet Mask: 255.255.255.240
Default Gateway: 192.168.10.46
Which of the following would allow the user to connect to network resources?
A. Change the default gateway to 192.168.10.1
B. Change the default gateway to 192.168.10.254
C. Change the IP address to 192.168.10.31
D. Change the IP address to 192.168.10.33
D. Change the IP address to 192.168.10.33
The given ip address is network id which we don’t assign to the host so the next ip is applicable to this.
Which of the following DNS records is used to identify a domain's SMTP server? A. CNAME B. PTR C. MX D. A
C. MX
Amail exchanger record(MX record) is a type of resource record in the Domain Name System that specifies a mail server responsible for accepting email messages on behalf of a recipient’s domain, and a preference value used to prioritize mail delivery if multiple mail servers are available. The set of MX records of a domain name specifies how email should be routed with the Simple Mail Transfer Protocol (SMTP).
Which of the following TCP ports are used by FTP? (Select TWO). A. 20 B. 21 C. 22 D. 23 E. 25 F. 80
A. 20 & B. 21
FTP uses two ports by default: 21 for sending commands, and 20 for sending data. For instance if you said “FTP “ it would make the attempt using port 21. If the session was established, port 20 would be using for the data. NotE.These are the default ports which is what I assume you were asking. A server administrator can however configure FTP to use whatever port he defines.
Which of the following protocols is MOST commonly used for the transfer of router configuration files? A. SSL B. TFTP C. DNS D. IMAP
B. TFTP
Trivial File Transfer Protocol(TFTP) is a file transfer protocol notable for its simplicity. It is generally used for automated transfer of configuration or boot files between machines in a local environment. Compared to FTP, TFTP is extremely limited, providing no authentication, and is rarely used interactively by a user.
Which of the following protocols resolves IP addresses to MAC addresses? A. DNS B. ARP C. RARP D. NTP
B. ARP
ARP is used to convert an IP address to a physical address such as an Ethernet address. ARP has been implemented with many combinations of network and data link layer technologies, such as
IPv4,Chaosnet,DECnetand Xerox PARC Universal Packet (PUP) using IEEE 802 standards, FDDI, X.25, Frame Relay and Asynchronous Transfer Mode (ATM). IPv4 over IEEE 802.3 and IEEE 802.11 is the most common case.
Which of the following port numbers is used for SNMP? A. 61 B. 151 C. 161 D. 1611
C. 161
Simple Network Management Protocol(SNMP) is an “Internet-standard protocol for managing devices on IP networks”. Devices that typically support SNMP include routers, , servers, workstations, printers, modem racks, UPSes and more. It is used mostly in network management systems to monitor network attached devices for conditions that warrant administrative attention.
Which of the following is the definition of a DNS server?
A. Hosts proprietary business applications
B. Translates FQDN’s to IP addresses
C. Provides network IDS/IPS security
D. Assigns IP addresses to network devices
B. Translates FQDN’s to IP addresses
Domain Name System (DNS) is the name resolution protocol for TCP/IP networks, such as the Internet. Client computers query a DNS server to resolve memorable, alphanumeric DNS names to the IP addresses that computers use to communicate with each other.
Which of the following features can BEST be used to facilitate authorized remote access to a network? A. VPN concentrator B. Proxy server C. Content filter D. Load balancer
A. VPN concentrator
The VPN Concentrator is used for Remote Access VPN’s. In typical use, a Remote Access VPN allows users to use an encrypted tunnel to securely access a corporate or other network via the Internet.
Which of the following is a Class A IP address? A. 10.4.0.1 B. 169.254.0.1 C. 192.168.0.1 D. 254.200.0.1
A. 10.4.0.1
Class A ip address ranges from 10.0.0.0 to 10.255.255.255
A network where all traffic feeds through a centralized gateway uses which of the following topologies? A. Peer-to-peer B. Ring C. Bus D. Star
D. Star
A bus topology is a type of network setup where each computer and network device is connected to a single cable or backbone.
In order to limit the number of dynamic addresses of hosts on a network, which of the following can be implemented? A. Scope options B. Leases C. Reservations D. DNS suffixes
C. Reservations
DHCP Reservation is used to assign a fixed IP Address to a device that always requires the same IP Address every time it is in use. This feature can be used for a print server, IP Camera, Network storage device as well as a computer
Which of the following IP address/subnet mask combinations represent a broadcast address? (Select TWO). A. 200.200.100.0/28 B. 200.200.100.32/27 C. 200.200.100.63/27 D. 200.200.100.79/27 E. 200.200.100.95/27 F. 200.200.100.254/30
C. 200.200.100.63/27 & E. 200.200.100.95/27
A broadcast address is a logical address at which all devices connected to a multiple-access communications network are enabled to receive datagrams. A message sent to a broadcast address is typically received by all network-attached hosts, rather than by a specific host. ReferencE.http://www.wikihow.com/Calculate-Networkand-Broadcast-Address
Which of the following networking devices can exist at several layers of the OSI model at the same time?(Select TWO). A. Switch B. Cable C. Repeater D. Router E. Bridge F. Hub
A. Switch & D. Router
A Multilayer Switch and Router work from OSI layer 2, 3 or 4 to IP DSCP (if IP packet) and/or VLAN IEEE 802.1p.
Which of the following is a path vector routing protocol? A. RIP B. EIGRP C. ISIS D. OSPF E. BGP
E. BGP
BGP (Border Gateway Protocol) is a protocol for exchanging routing information between gateway hosts (each with its own router) in a network of autonomous systems. BGP is often the protocol used between gateway hosts on the Internet. The routing table contains a list of known routers, the addresses they can reach, and a cost metric associated with the path to each router so that the best available route is chosen.
Hosts using BGP communicate using the Transmission Control Protocol (TCP) and send updated router table information only when one host has detected a change. Only the affected part of the routing table is sent.
Which of the following routing protocols utilizes the DUAL algorithm for determining best path? A. EIGRP B. RIPv2 C. OSPF D. RIP
A. EIGRP
Explanation: Diffusing Update Algorithm guarantees loop-free operation and provides a mechanism for fast convergence.
What is EIGRP?
EIGRP is an enhanced version of IGRP. The same distance vector technology found in IGRP is also used in EIGRP, and the underlying distance information remains unchanged.
The convergence properties and the operating efficiency of this protocol have improved significantly. This allows for an improved architecture while retaining existing investment in IGRP.
The convergence technology is based on research conducted at SRI International. The Diffusing Update Algorithm (DUAL) is the algorithm used to obtain loop-freedom at every instant throughout a route computation. This allows all routers involved in a topology change to synchronize at the same time. Routers that are not affected by topology changes are not involved in the recomputation. The convergence time with DUAL rivals that of any other existing routing protocol.
EIGRP has been extended to be network-layer-protocol independent, thereby allowing DUAL to support other protocol suites.
How Does EIGRP Work?
EIGRP has four basic components:
Neighbor Discovery/Recovery
Reliable Transport Protocol
DUAL Finite State Machine
Protocol Dependent Modules
Neighbor Discovery/Recovery is the process that routers use to dynamically learn of other routers on their directly attached networks. Routers must also discover when their neighbors become unreachable or inoperative. This process is achieved with low overhead by periodically sending small hello packets. As long as hello packets are received, a router can determine that a neighbor is alive and functioning. Once this is determined, the neighboring routers can exchange routing information.
The reliable transport is responsible for guaranteed, ordered delivery of EIGRP packets to all neighbors. It supports intermixed transmission of multicast or unicast packets. Some EIGRP packets must be transmitted reliably and others need not. For efficiency, reliability is provided only when necessary. For example, on a multi-access network that has multicast
capabilities, such as Ethernet, it is not necessary to send hellos reliably to all neighbors
individually. So EIGRP, sends a single multicast hello with an indication in the packet
informing the receivers that the packet need not be acknowledged. Other types of packets,
such as updates, require acknowledgment and this is indicated in the packet. The reliable
transport has a provision to send multicast packets quickly when there are unacknowledged
packets pending. This helps insure that convergence time remains low in the presence of
varying speed links.
The DUAL finite state machine embodies the decision process for all route computations. It tracks all routes advertised by all neighbors. The distance information, known as a metric, is
used by DUAL to select efficient loop free paths. DUAL selects routes to be inserted into a
routing table based on feasible successors. A successor is a neighboring router used for
packet forwarding that has a least cost path to a destination that is guaranteed not to be
part of a routing loop. When there are no feasible successors but there are neighbors
advertising the destination, a recomputation must occur. This is the process where a new
successor is determined. The amount of time it takes to recompute the route affects the
convergence time. Even though the recomputation is not processor-intensive, it is
advantageous to avoid recomputation if it is not necessary. When a topology change occurs, DUAL will test for feasible successors. If there are feasible successors, it will use
any it finds in order to avoid any unnecessary recomputation. Feasible successors are
defined in more detail later in this document.
The protocol-dependent modules are responsible for network layer, protocol-specific
requirements. For example, the IP-EIGRP module is responsible for sending and receiving
EIGRP packets that are encapsulated in IP. IP-EIGRP is responsible for parsing EIGRP
packets and informing DUAL of the new information received. IP-EIGRP asks DUAL to make routing decisions and the results of which are stored in the IP routing table. IP-EIGRP is responsible for redistributing routes learned by other IP routing protocols.
The network interface layer of the TCP/IP model corresponds with which of the following layers of the OSI model? (Select TWO). A. Transport layer B. Network layer C. Session layer D. Physical layer E. Presentation layer F. Data link layer
D. Physical layer & F. Data link layer
The lowest layer of the OSI Reference Model is the physical layer, which is responsible for the “nitty gritty” details of transmitting information from one place to another on a network. The layer just above the physical layer is the data link layer, called the network interface layer or just the link layer in the TCP/IP architectural
model. Its primary job is to implement networks at the local level, and to interface between the hardware oriented physical layer, and the more abstract, software- oriented functions of the network layer and those above it.
Which of the following BEST describes the definition of DHCP?
A. DHCP is utilized to dynamically lease IP addresses to hosts.
B. DHCP is utilized to statically lease IP address to hosts.
C. DHCP is utilized to permanently lease IP address dynamically to hosts.
D. DHCP is utilized to permanently lease IP address statically to hosts.
A. DHCP is utilized to dynamically lease IP addresses to hosts.
Because DHCP server maintains a database of available IP addresses and configuration information. When the server receives a request from a client, the DHCP server determines the network to which the DHCP client is connected, and then allocates an IP address or prefix that is appropriate for the client, and sends configuration information appropriate for that client
Multiple servers’ IP addresses fall within the DHCP scope assigned by the administrator. Which of the following
should be implemented to ensure these static IP addresses are not assigned to workstations?
A. The administrator should create exclusions for the workstations IP addresses.
B. The administrator should change the servers to utilize DHCP to obtain IP addresses.
C. The administrator should change the workstations to utilize static IP addresses.
D. The administrator should create exclusions for the servers IP addresses.
D. The administrator should create exclusions for the servers IP addresses.
Whenever you define the ip pool from which IP addresses are to be dynamically assigned to the users then in order to avoid assignment of static ip address we can creat exclusion for the static ip addresses so that they are not assigned to any other host and this is how we can avoid ip address conflict on the network.
The APIPA address 169.254.10.123 falls into which of the following class of addresses? A. A B. B C. C D. D
B. B As the range for class B is from 128.0.0.0 to 191.255.255.255
A technician replaces a failed router in an office with the same model unit using the default settings. After the installation, the technician reboots all of the PCs and servers. Upon reboot some of the PCs are receiving IP addresses on the same subnet as the new router; other PCs are receiving addresses on the same subnet as the servers. Which of the following most likely describes the issue?
A. The DHCP lease pool was not large enough
B. DHCP lease times were set too low
C. The router is not the only DHCP server
D. DHCP was not enabled on the replacement router
C. The router is not the only DHCP server
This happens when there are multiple DHCP servers in the same LAN subnet. Here some machines are getting ip address from the router while some are getting ip address from another DHCP server present in the same domain.
Which of the following is the OSI layer that handles file compression such as LZMA or DEFLATE? A. Layer 3 B. Layer 5 C. Layer 6 D. Layer 7
C. Layer 6
The presentation level is translator between the application and network format. Unlike the lower layers, its concern is with the syntax and semantics of the information transmitted. Most user programs do not exchange random binary bit strings. They exchange data such as names, addresses, dates, etc. Different computers store the data in a different way. In order to allow these computers to transmit the data to each other the presentation layer translates the data into a standard form to be used on the network. Another function is data
compression which can be used to reduce the number of bits needed to send the packet of information. Security is also added at this layer by using data encryption and decryption. This prevents others from intercepting the data and being able to decipher the meaning of the bits.
Which of the following provides secure access to a network device? A. SNMPv2 B. FTP C. RSH D. SSH
D. SSH
Explanation: Secure Shell(SSH) is a cryptographic network protocol for secure data communication, remote command-line login, remote command execution, and other secure network services between two networked computers that connects, via a secure channel over an insecure network, a server and a client (running SSH server and SSH client programs, respectively).
Which of the following uses distance vector algorithms to determine the BEST network route to a destination address? A. IS-IS B. OSPF C. BGP D. RIP
D. RIP
“Distance Vector” and “Link State” are terms used to describe routing protocols which are used by routers to forward packets between networks. The terms distance vector and link state are used to group routing protocols into two broad categories based on whether the routing protocol selects the best routing path based on a distance metric (the distance) and an interface (the vector), or selects the best routing path by calculating the state of each link in a path and finding the path that has the lowest total metric to reach the destination. Distance is the cost of reaching a destination, usually based on the number of hosts the path passes through, or the total of all the administrative metrics assigned to the links in the path Distance vector protocols use a distance calculation plus an outgoing network interface (a vector) to choose the best path to a destination network. The network protocol (IPX, SPX, IP, Appletalk, DECnet etc.) will forward data using the best paths selected. Common distance vector routing protocols include: Appletalk RTMP IPX RIP IP RIP IGRP
Which of the following uses classless subnet masks across a network? A. Subnetting B. CIDR C. Supernetting D. Summarization
B. CIDR
Classless Inter-Domain Routing is based onvariable-length subnet masking(VLSM), which allows a network to be divided into variously sized subnets, providing the opportunity to size a network more appropriately for local needs and also CIDR allows an address or routing prefix to be written with a suffix indicating the number of bits
of the prefix, such as 192.168.2.0/24.
Enterprise IP routing policy is MOST clearly depicted in which of the following configuration management documents? A. Logical network diagrams B. Physical network diagrams C. Wiring schematics D. Group security role assignments
A. Logical network diagrams
A logical network diagram illustrates the network architecture of a group of interconnected computers and other devices, such as printers, modems, switches, routers, and even mobile devices. These electronic components form the physical network that provides local area network (LAN) and wide area network (WAN) access to
users. Once you know the layout and you have an idea about the packet flow then your job becomes easy and you can create an action plan to go for the implementation.
While working on a PC, a technician notices 0.0.0.0 in the routing table. Which of the following does this
indicate
A. It is the default route.
B. This is the address for the DHCP server.
C. The PC has not been assigned an IP address.
D. The firewall is down.
A. It is the default route.
The address 0.0.0.0 generally means “any address”. If a packet destination doesn’t match an individual address in the table, it must match a 0.0.0.0 gateway address. In other words, default gateway is
always pointed by 0.0.0.0:
If a NIC does not have a link light, there is a failure at which of the following OSI layers? A. Physical B. Session C. Data link D. Presentation
A. Physical
Explanation: The NIC does not have light refers to a situation that there could be a fault in the LAN cable or the ports are down and all of these fall under the physical layer. To make it simple, it falls in physical layer because blinking lights refers to the physical connectivity.
Which of the following OSI layers allows users to access network services such as file sharing? A. Layer 1 B. Layer 3 C. Layer 4 D. Layer 7
D. Layer 7
Basically File Transfer protocol (FTP) is responsible for file transfer which lies under Application layer (Layer 7) of OSI layers.
Which of the following can function in an unsecure mode? A. SNMPv3 B. SSH C. SSL D. SCP
A. SNMPv3
SNMPv3 makes no changes to the protocol aside from the addition of cryptographic security, it looks much different due to new textual conventions, concepts, and terminology.SNMPv3 primarily added
security and remote configuration enhancements to SNMP
Which of the following is used to register and resolve IP addresses with their plain language equivalents? A. Proxy server B. DNS server C. Brouter equipment D. DHCP server
B. DNS server
DNS server translate (resolution) the human-memorable domain names and hostnames into the corresponding numeric Internet Protocol (IP) addresses.
Which of the following switch features allows for both incoming and outgoing data across physical ports at the same time? A. Burst-frame B. Full-duplex C. Half-duplex D. VoIP
B. Full-duplex
Afull-duplex(FDX), or sometimesdouble-duplexsystem, allows communication in both directions, and, unlike half-duplex, allows this to happen simultaneously. Land-line telephone networks are full-duplex, since they allow both callers to speak and be heard at the same time
Which of the following is a common physical network topology? A. Cross-over B. Loopback C. Star D. Straight
C. Star
A star network consists of one centralswitch,hubor computer, which acts as a conduit to transmit messages. This consists of a central node, to which all other nodes are connected; this central node provides a common connection point for all nodes through a hub. In star topology, every node (computer workstation or any other peripheral) is connected to central node called hub or switch.
Which of the following is always true when a router selects a destination?
A. The default gateway is selected over any other static or dynamic route.
B. The shortest route is always selected.
C. The most specific route is selected over the default gateway.
D. A dynamic route is selected over a directly attached network.
C. The most specific route is selected over the default gateway.
Router always looks for the most closely matched route for forwarding the packet. For example if there are two routes in your router and you have to send a packet to a host with an ip 10.10.10.10 then it will
forward packet to 192.168.1.10 rather than 192.168.1.1:
Network
Destination 0.0.0.0 0.0.0.0
Netmask 255.255.255.0
Gateway 192.168.1.1
10.10.10.0 192.168.1.10
A proxy server would MOST likely be installed to provide which of the following functions? (Select TWO). A. Combined DNS and DHCP hosting B. Encryption C. Content filtering D. Fault tolerance E. Website caching
C. Content filtering & E. Website caching
A content-filtering web proxy server provides administrative control over the content that may be relayed in one or both directions through the proxy. A caching proxyserver accelerates service requests by
retrieving content saved from a previous request made by the same client or even other clients.
Which of the following would the telecommunications carrier use to segregate customer traffic over long fiber links? A. VLAN B. MPLS C. VPN D. PSTN
B. MPLS
Multiprotocol Label Switching (MPLS) is a standards-approved technology for speeding up network traffic flow and making it easier to manage. MPLS involves setting up a specific path for a given sequence of packets, identified by a label put in each packet, thus saving the time needed for a router to look up the address to
the next node to forward the packet to. MPLS is called multiprotocol because it works with the Internet Protocol (IP), Asynchronous Transport Mode (ATM), and frame relay network protocols. With reference to the standard model for a network (the Open Systems Interconnection, or OSI model), MPLS allows most packets to be forwarded at the Layer 2 (switching) level rather than at the Layer 3 (routing) level. In addition to moving traffic faster overall, MPLS makes it easy to manage a network for quality of service (QoS). For these reasons, the technique is expected to be readily adopted as networks begin to carry more and different mixtures of traffic
An administrator notices SMTP traffic is being blocked by the company firewall. Which of the following ports should be opened? A. 25 B. 53 C. 110 D. 443
A. 25
SMTPis an Internet standard for electronic mail (e-mail) transmission across Internet Protocol (IP) networks. SMTP uses TCP port 25.
Which of the following network topologies would be separated into two networks if a client in the middle is removed or the cable is cut? A. Mesh B. Ring C. Bus D. Star
C. Bus
Abus network topologyis a network topology in which a set of clients are connected via a shared communications line/cables, called a bus.
Which of the following is an example of a Class C address? A. 10.19.0.79 B. 127.34.8.197 C. 176.96.1.222 D. 192.168.1.105
D. 192.168.1.105
Class C address range varies from 192.0.0.0 to 223.255.255.255.
Which of the following standards can operate at either 20MHz or 40MHz channel spacing? A. 802.11a B. 802.11b C. 802.11g D. 802.11n
D. 802.11n
The 2.4 GHz ISM band is fairly congested. With 802.11n, there is the option to double the bandwidth per channel to 40 MHz which results in slightly more than double the data rate. However, when in 2.4 GHz, enabling this option takes up to 82%[10] of the unlicensed band, which in many areas may prove to be infeasible. The specification calls for requiring one primary 20 MHz channel as well as a secondary adjacent channel spaced ±20 MHz away. The primary channel is used for communications with clients incapable of 40 MHz mode. When in 40 MHz mode, the center frequency is actually the mean of the primary and secondary channels.
A network technician has just upgraded a switch. The new switch’s IP range and subnet mask correctly match other network devices. The technician cannot ping any device outside of the switch’s own IP subnet. The previous switch worked correctly with the same settings. Which of the following is MOST likely the problem?
A. The proxy server is set incorrectly.
B. The Ethernet cable is pinched.
C. The network gateway is set incorrectly.
D. The IP address is set incorrectly.
C. The network gateway is set incorrectly.
When user is able to ping everything in its own subnet that means that all the hosts are reachable however when you are not able to ping anything outside of this subnet then please check if the device is sending traffic to the correct host who should forward it to the further devices.
Joe has a small office and is looking to replace his phone system with a lower cost solution that requires minimal in-house support. Which of the following is the BEST choice? A. Wide Area Network B. NAT C. Virtual PBX D. Virtual LAN
C. Virtual PBX
Virtual PBX,a business phone system providing call routing, follow-me calling, voice-mail, fax-mail, and ACD queues with no customer installed equipment.
Which of the following performance optimization techniques would be MOST beneficial for a network-wide VoIP setup? (Select TWO). A. Proxy server B. Traffic shaping C. Caching engines D. Load balancing E. Quality of service
B. Traffic shaping & E. Quality of service
Traffic shaping retains excess packets in a queue and then schedules the excess for later transmission over increments of time. The result of traffic shaping is a smoothed packet output rate. QoS (Quality of Service) is a major issue in VOIP implementations. The issue is how to guarantee that packet traffic for a voice or other media connection will not be delayed or dropped due interference from other lower priority traffic.
Things to consider are:
Latency: Delay for packet delivery
Jitter: Variations in delay of packet delivery
Packet loss: Too much traffic in the network causes the network to drop packets
Buss nest of Loss and Jitter: Loss and Discards (due to jitter) tend to occur in bursts
A customer has requested a solution using multiple WAPs for wireless access. Which of the following should be different on each WAP to prevent wireless problems? A. Firewalls B. VLANs C. Channels D. Antenna types
C. Channels
Protocol requires 16.25 to 22 MHz of channel separation (as shown above), adjacent channels overlap and will interfere with each other.
Channels 1, 6, and 11 are the most common channels to choose, and most routers will use one of them as the default channel–but the general idea is to be as far away from everybody else as you can
Which of the following wireless standards has a MAXIMUM transfer rate of 11Mbps? A. 802.11a B. 802.11b C. 802.11g D. 802.11n
B. 802.11b The 802.11b standard allows for a maximum data transfer speed of 11 Mbps, at a range of about 100 m indoors and up to 200 metres outdoors (or even beyond that, with directional antennas.) Hypothetical Range(indoors) Range(outdoors)speed 11 Mbits/s 50 m 200 m 5.5 Mbits/s 75m 300 m 2 Mbits/s 100 m 400 m 1 Mbit/s 150 m 500 m
A network technician needs to configure a port on a switch to provide connectivity and electrical support to a WAP being installed in a warehouse. Which of the following features needs to be configured on the switch? A. STP B. PoE C. VTP trunking D. Port forwarding
B. PoE
Power over Ethernet or PoE describes any of several standardized or ad-hoc systems which pass electrical power along with data on Ethernet cabling. This allows a single cable to provide both data connection and electrical power to devices such as wireless access points or IP cameras.
The network support team is constantly getting calls from users in a specific area of an office building. The users are able to connect to the office wireless network, but they sometimes disconnect or experience very slow download speeds. Which of the following is MOST likely the problem? A. Incorrect service set identifier B. Low signal strength or interference C. Incorrect encryption scheme D. Incorrect IP address or subnet mask
B. Low signal strength or interference
This generally happens when the signals are weak in any particular area and any movement can make you lose connectivity to the internet. In this case you can try to increase the radio power so that the signal strength can be increased.
A technician needs multiple networks, high speeds, and redundancy on a system. Which of the following configurations should be considered for these requirements? (Select TWO). A. Routing table B. Next hop C. Port mirroring D. Port monitoring E. VLANs
C. Port mirroring & E. VLANs
Port mirroring is used on a network switch to send a copy of network packets seen on one switch port (or an entire VLAN) to a network monitoring connection on another switch port. This is commonly used for network appliances that require monitoring of network traffic, such as an intrusion detection system, passive probe or real user monitoring (RUM) technology that is used to support application performance management (APM). In computer networking, a single layer-2 network may be partitioned to create multiple distinct broadcast domains, which are mutually isolated so that packets can only pass between them via one or more routers; such a domain is referred to as a Virtual Local Area Network, Virtual LAN or VLAN.
A user reports that some normally accessible external sites are not responding, but most other sites are responding normally. Which of the following is MOST likely the cause? A. VLAN tag mismatch B. Wrong subnet mask C. Smurf attack D. Faulty routing rule
D. Faulty routing rule
This happens when the DNS server is able to resolve the URL but there can be a conflicting route pointing to somewhere else rather than to the correct device who is responsible for routing traffic to the internet.
During a disaster recovery test, several billing representatives need to be temporarily setup to take payments from customers. It has been determined that this will need to occur over a wireless network, with security being enforced where possible. Which of the following configurations should be used in this scenario? A. WPA2, SSID enabled, and 802.11n. B. WEP, SSID enabled, and 802.11b. C. WEP, SSID disabled, and 802.11g. D. WPA2, SSID disabled, and 802.11a.
D. WPA2, SSID disabled, and 802.11a.
WPA2 is a security technology commonly used on Wi-Fi wireless networks. WPA2 (Wireless Protected Access
2) replaced the original WPA technology on all certified Wi-Fi hardware since 2006 and is based on the IEEE
802.11i technology standard for data encryption.
Which of the following wiring distribution types, often found in company closets, is used to connect wiring from individual offices to the main LAN cabling? A. MDF B. 66 block C. IDF D. Patch panel
D. Patch panel
A patch panel, patch bay, patch field or jack field is a number of circuits, usually of the same or similar type, which appear on jacks for monitoring, interconnecting, and testing circuits in a convenient, flexible manner.
Which of the following is the difference between 802.11b and 802.11g? A. Distance B. Frequency C. Speed D. Transmission power
C. Speed
802.11b has a maximum speed of 11Mbps whereas 802.11g has a speed of 54Mbps.
Which of the following connectors is usable in SFP modules? A. ST B. LC C. LX D. SX
B. LC
LC connector is used in SFP modules.
A user reports that several spots within the company's office have intermittent connectivity issues with the newly installed wireless network. There are several WAPs located around the office to provide a strong signal wherever the users are. Which of the following is the MOST likely cause of the problem? A. Incompatible network card B. Channel overlap C. Latency D. WEP encryption
B. Channel overlap
To reduce interference between wireless APs, ensure that wireless APs with overlapping signals use unique channel frequencies. The 802.11b standard reserves 14 frequency channels for use with wireless APs.
A customer is having problems connecting to a wireless network in a shared office space. The customer can detect several other wireless network signals. All of the wireless networks have different SSIDs but several are using the same encryption type. Which of the following should be configured on the customer’s wireless network to improve connectivity to the wireless network?
A. Change the SSID to match other wireless networks for increased throughput.
B. Change the encryption type to a different mechanism to avoid interference.
C. Change the channel to a different channel than the other wireless networks.
D. Change the WAP to a different manufacturer than the other wireless networks
C. Change the channel to a different channel than the other wireless networks.
To reduce interference between wireless APs, ensure that wireless APs with overlapping signals use unique channel frequencies. The 802.11b standard reserves 14 frequency channels for use with wireless APs. You can use any other channel instead of the one that you are using.
A network technician is setting up a wireless access point that would only allow a certain laptop to be able to access the WAP. By using ACL, which of the following would be filtered to ensure only the authorized laptop can access the WAP? A. NetBIOS name filtering B. IP address filtering C. MAC address filtering D. Computer name filtering
C. MAC address filtering MAC Filtering (or EUI filtering, or layer 2 address filtering) refers to a security access control method whereby the 48-bit address assigned to each network card is used to determine access to the network. MAC addresses are uniquely assigned to each card, so using MAC filtering on a network permits and denies network access to specific devices through the use of blacklists and whitelists. While the restriction of network access through the use of lists is straightforward, an individual person is not identified by a MAC address, rather a device only, so an authorized person will need to have a whitelist entry for each device that he or she would use to access the network.
Which of the following is the BEST way to prevent new users from connecting to a wireless access point, but still allow already connected users to continue to connect?
A. Create a MAC filter containing the current users.
B. Turn off SSID broadcast.
C. Change the encryption type to AES 256-bit for current users.
D. Reduce the signal strength to 0 percent.
A. Create a MAC filter containing the current users. MAC Filtering (or EUI filtering, or layer 2 address filtering) refers to a security access control method whereby the 48-bit address assigned to each network card is used to determine access to the network. MAC addresses are uniquely assigned to each card, so using MAC filtering on a network permits and denies network access to specific devices through the use of blacklists and whitelists. While the restriction of network access through the use of lists is straightforward, an individual person is not identified by a MAC address, rather a device only, so an authorized person will need to have a whitelist entry for each device that he or she would use to access the network.
A network administrator is tasked with deploying a company-wide wireless system which allows for accurate tracking of employees' wireless device locations via WAP triangulation. Which of the following is the MOST important aspect of the deployment? A. WAP placement B. TX/RX channel C. Signal strength D. Transmission power
A. WAP placement
Before going ahead with the deployment, the first thing that need to be check is where you are going to place your wireless router so that you can have internet connectivity from every location that you need.
A network administrator needs to implement a monitoring tool and be able to send log information to a server and receive log information from other clients. Which of the following should be implemented? (Select TWO). A. SNMP B. Network sniffer C. Syslog D. System log E. History log
A. SNMP & C. Syslog
Simple Network Management Protocol (SNMP) is an “Internet-standard protocol for managing devices on IP networks”. Devices that typically support SNMP include routers, switches, servers, workstations, printers, modem racks and more. It is used mostly in network management systems to monitor network-attached devices for conditions that warrant administrative attention. Syslog is a standard for computer message logging. It permits separation of the software that generates messages from the system that stores them and the software that reports and analyzes them.
A network administrator must ensure that both the server and the client are authenticated to the wireless system before access is granted. Which of the following should be implemented to meet this requirement? A. EAP-PEAP B. MAC ACL C. EAP-TTLS D. MS-CHAPv2
C. EAP-TTLS
Extensible Authentication Protocol, or EAP, is an authentication framework frequently used in wireless networks and Point-to-Point connections. EAP is an authentication framework providing for the transport and usage of keying material and parameters generated by EAP methods.
A technician has low signal strength connecting two wireless bridges. Which of the following could be the problem? A. Low PoE wattage B. Opposing antenna polarizations C. Short distance between antennas D. WPA 2 encryption
B. Opposing antenna polarizations
The polarization of an antenna is the orientation of the electric field (E-plane) of the radio wave with respect to the Earth’s surface and is determined by the physical structure of the antenna and by its orientation. It has nothing in common with antenna directionality terms: “horizontal”, “vertical”, and “circular”. Thus, a simple straight wire antenna will have one polarization when mounted vertically, and a different polarization when mounted horizontally.
Which of the following is a terminal emulator used to manage a network device? A. VPN B. IDS C. PuTTY D. IPS
C. PuTTY
PuTTY is a free and open-source terminal emulator, serial console and network file transfer application. It supports several network protocols, including SCP, SSH, Telnet and rlogin.
A network administrator suspects a broadcast storm is causing performance issues on the network. Which of the following would be used to verify this situation? A. Environmental monitor B. Multimeter C. Toner probe D. Protocol analyzer
D. Protocol analyzer
A “Protocol analyzer” is a tool (hardware or software) used to capture and analyze signals and data traffic over a communication channel.
Ann, a technician, is installing network cables for an office building. Some of the cables are not showing active on the switch even when moved to different ports. Which of the following is MOST likely the cause? A. Port speed mismatch B. Faulty F-connectors C. Bad wiring D. Bad switch
C. Bad wiring
Bad wiring refers to the state when you do not follow a pattern and everything seems messed up and you are not able to figure out the cause.
After a new user moves furniture into a cubicle, the computer does not connect to the network any longer. Which of the following would be the MOST likely reason? (Select TWO). A. Bad Ethernet switch port B. TX/RX reversed C. Bad connectors D. Bad patch cable E. Mismatched MTU
C. Bad connectors & D. Bad patch cable
It could be problem with the bad connector because the user just moved furniture to the cubicle and it is quite possible that the movement of the furniture has created problem by disrupting the cabling and connections. These two are the important things which can be broken down whenever there is a physical movement.
Which of the following performance benefits would multiple domain controllers BEST provide? A. Fault tolerance B. Caching engine C. Proxy server D. Quality of service
A. Fault tolerance
Fault-tolerant design is a design that enables a system to continue its intended operation, possibly at a reduced level, rather than failing completely, when some part of the system fails. The term is most commonly used to describe computer-based systems designed to continue more or less fully operational with, perhaps, a reduction in throughput or an increase in response time in the event of some partial failure
After a network technician has added a new workstation and cabling to the network, users report the network is very slow. The activity lights on all switches are blinking rapidly, showing large amounts of traffic. Which of the following is the BEST explanation for the traffic?
A. The new user is downloading large files.
B. The router failed, flooding the network with beacons.
C. The new user’s IP address is a duplicate.
D. A switching loop was created.
D. A switching loop was created.
A Switching loop or Bridge loop occurs in computer networks when there is more than one Layer 2 (OSI model) path between two endpoints (e.g. multiple connections between two network switches or two ports on the same switch connected to each other). The loop creates broadcast radiation as broadcasts and multicasts are
forwarded by switches out every port, the switch or switches will repeatedly rebroadcast the broadcast messages flooding the network.
A company has recently allowed its employees to telecommute two days a week. The employees MUST have a minimum of 1Mbps non-shared connection to the Internet. Which of the following MUST the employees have at their home in order to connect to the Internet? A. ISDN B. Cable modem C. DSL D. Dial-up networking
C. DSL
Digital subscriber line (DSL, originally digital subscriber loop) is a family of technologies that provide Internet access by transmitting digital data over the wires of a local telephone network.
Some visitors are unable to access the wireless network. The network’s wireless infrastructure is comprised of three different buildings with the configurations listed below. Wireless network in Building A and C is used exclusively for internal employees and Building B is used for visitors and requires no addition a configuration on their devices. Which of the following settings would need to be modified to provide wireless access to all visitors?
A. Encryption set to Open in all Buildings
B. Encryption set to Open in Building B
C. Encryption set to WEP in Building B
D. Channel set to 11 in Building B
B. Encryption set to Open in Building B
Because the building B is in the middle, the wireless access router will have reachability to the building A and C. Now, the only thing that we need to do is to open the Wireless access on B for the guest users for the WAP in B so that the users coming to building A and C can get access to internet using the open connection.
Some employees are unable to maintain a wireless network connection. The network’s wireless infrastructure is comprised of three different buildings with the configurations listed below. Wireless network in Building A and C is used exclusively for internal employees and Building B is used for visitors and requires no additional configuration on their devices. Which of the following settings would need to be modified to provide the BEST wireless experience for all employees as they move between buildings?
A. Change Channel in Building B to 7
B. Change Encryption in Building B to match A and C
C. Change Channel in Building C to 1
D. Change SSID in Building C to match Building A
D. Change SSID in Building C to match Building A
The configuration difference between users in building A and C is that they have same encryption however the SSID is different so the user has to manually authenticate and connect to the network whenever he will move between buildings. If the SSID’s are same then he will not have to authenticate himself again and he will get automatic connectivity
A technician has been given the task to install a wireless network in a user’s home. Which of the following should the technician consider when implementing the network? (Select TWO).
A. That there is strong encryption enabled and configured on the access point.
B. The user’s home network has a correctly completed WHOIS entry.
C. The access point is broadcasting the SSID based upon manufacturer’s standards.
D. There are no conflicts of channels in use by neighboring wireless networks.
E. There are redundant internal DNS names set in the access point’s settings.
F. That the access point’s MAC address is properly set in its configuration settings
A. That there is strong encryption enabled and configured on the access point. & D. There are no conflicts of channels in use by neighboring wireless networks. Strong encryption is required to keep the user’s internet safe and secure so as to avoid misuse of the internet connection and to ensure that channel conflicts are not there so that the signals do not compete with each other and user start to face intermittent connection.
A technician working for a company with a wireless network named WirelessA notices a second wireless network named WirelessB. WirelessB is MOST likely a: A. man-in-the-middle attack B. rogue access point C. evil twin D. packet sniffer
B. rogue access point
A rogue access point is a wireless access point that has either been installed on a secure company network without explicit authorization from a local network administrator, or has been created to allow a hacker to conduct a man-in-the-middle attack.
A user cannot access the LAN after working successfully most of the day. Which of the following should thenetwork administrator check FIRST? A. VLAN settings B. History logs C. Patch cable D. Port security
C. Patch cable
A patch cable or patch cord or patch lead is an electrical or optical cable used to connect (“patch- in”) one electronic or optical device to another for signal routing.
Which of the following can be used to limit wireless network access to a single computer? A. Configure PPP B. Packet sniffing C. MAC address filtering D. Omni-directional antennas
C. MAC address filtering
Wireless access can be filtered by using theMedia Access Control (MAC)addresses of the wireless devices transmitting within your wireless network. You can either permit or prevent specific wireless computers and devices access to your wireless network.
A small business owner is setting up a SOHO office. The business owner needs one device that will allow for Internet access, trunk VLANs, translate multiple private IP addresses into public IP addresses, and filter packets. Which of the following network devices will allow for all functions? A. A VPN concentrator B. A switch C. A router D. A firewall
C. A router
A router is a device which is capable of performing entire task required by the business owner.
A Linux-based workstation is unable to connect to an IP printer on the same network segment. The printer IP address settings have been verified. How would a network technician verify IP address settings on the Linux based workstation?
A. Run the dig command on the workstation.
B. Run the nslookup command on the workstation.
C. Run the ipconfig command on the workstation.
D. Run the ifconfig command on the workstation.
D. Run the ifconfig command on the workstation.
The “ifconfig” command allows the linux/unix operating system to setup network interfaces and allow the user to view information about the configured network interfaces.
Users have been stating that they need to logon to too many applications and web apps with different credentials that use different rule sets. Which of the following would BEST address these concerns?
A. Alter the domain account login policies to reflect the most common application rule sets.
B. Ensure that the user accounts are properly configured in domain services.
C. Implement a software solution that facilitates single sign-on authentication.
D. Increase the time between mandatory password changes by a factor of three.
C. Implement a software solution that facilitates single sign-on authentication. Asingle signonpermits a user to enter one name and password in order to access multiple applications
A network consultant arrives at a customer's site to troubleshoot their email server. The server is running a Linux operating system, but the consultant is only familiar with Windows operating systems. Which of the following troubleshooting steps should the consultant take? A. Document findings B. Identify the problem C. Escalate the problem D. Establish a plan of action
C. Escalate the problem
It is better to escalate the problem if you are not aware of the situation as it saves downtime and keeps customer happy.
A network administrator is adding 24 - 802.3af class 2 VoIP phones and needs to purchase a single PoE switch to power the phones. Which of the following is the MINIMUM PoE dedicated wattage the switch supports to power all of the phones at full power? A. 96W B. 168W C. 240W D. 369.6W
B. 168W
The switch supports 168W to power all the phones at full power.
Ann, a client, shares half of a rectangular floor plan with another company and wishes to set up a secure wireless network. The installed antenna limits the signal to her half of the floor. Through analysis, the frequency and channels of surrounding wireless networks have been determined and configuration changes made accordingly. Which of the following would be the NEXT step in setting up this secure wireless network?
A. Decrease signal strength on the antenna
B. Change the wireless channel on the WAP
C. Change the device placement to further obfuscate the signal
D. Set up encryption on the WAP and clients
D. Set up encryption on the WAP and clients
The encryption will help the clients and server to uniquely identify themselves in an interfering environment.
A technician is reviewing the following company diagram to determine proper connectivity settings: Which of the following device configurations is out of specifications? A. LaptopC B. ServerE C. LaptopB D. ServerA E. PC1
E. PC1
no legitimate Category 6e standard exists
A technician is reviewing the following aggregated information on a server to determine the cause of a user’s
connection problem:
Which of the following is the technician reviewing?
A. Syslog server logs
B. Application logs
C. Network sniffer logs
D. SNMPv2 queries
A. Syslog server logs
Syslog server logs are the logs that are saved on a system whenever an instance happens of the wireless device. Reviewing the logs can help him understand the behavior of the WAP as well as the client.
When a packet that is entering a switch port is encapsulated, which of the following is the switch performing? A. 802.1q B. Collision avoidance C. Port mirroring D. STP
A. 802.1q
Encapsulation is the term associated with 802.1q which is enabled by default on many devices.
A technician has been dispatched to investigate an issue where several users in the same aisle have stated they have had no network connection for over an hour. When the technician gets there, the network seems to be up and running. Which of the following should the technician do NEXT?
A. Ask the users for more information, such as which applications were not functioning.
B. Power-cycle the switch that the users share to clear out cached DNS records.
C. Escalate the issue to the network administrator to have their domain credentials reset.
D. Close and document the service call, as there was no actual issue affecting the users.
A. Ask the users for more information, such as which applications were not functioning. Because the system was up and running when the technician reached there, he can ask for applications that
were not working or can ask for more information so that he can isolate the problem. Power cycling will not help because the system is already up and recycling can wipe out logs. Escalation will also not help because the system is now up and running. Closing the call will be unfair because the same instance can occur again.
A technician has been dispatched to investigate connectivity problems of a recently renovated office. The technician has found that the cubicles were wired so that the network cables were run inside the conduit with the electrical cabling. Which of the following would MOST likely resolve the connectivity issue?
A. Power-cycle the computers and switches to re-establish the network connection.
B. Re-run the network cabling through the ceiling alongside the lights to prevent interference.
C. Test the wiring in the network jacks for faults using a cable verifier.
D. Re-run the network cabling so that they are 12 inches or more away from the electrical lines.
D. Re-run the network cabling so that they are 12 inches or more away from the electrical lines. The electric cables create electric field around them and can interrupt in internet connectivity as well. It is quite
possible that this is the cause which is creating the connectivity issue.
