All Together (No Answers Visible) Flashcards
(119 cards)
1
Q
By default, the pathping command sends how many pings per hop?
A
B) 100
2
Q
Select the component of enterprise level structured cabling that serves as the location where an incoming network interface enters a building and connects with the building’s backbone cabling:
A
D) entrance facility
3
Q
What is the maximum allowable distance for horizontal wiring?
A
B) 100 m
4
Q
What RFC outlines recommendations for private IP addresses?
A
B) RFC 1918
5
Q
Which network routing protocol is a path vector protocol that sends updates between routers using TCP?
A
D) BGP
6
Q
The segment or datagram protocol data unit exists at what layer of the OSI model?
A
B) Transport Layer
7
Q
In a TCP segment, what field indicates how many bytes the sender can issue to a receiver while acknowledgement for the segment is outstanding?
A
B) sliding window
8
Q
Which of the following is not one of the disadvantages of peer-to-peer networks?
A
D) They centralize user account logins
9
Q
What type of cross-talk occurs between wire pairs near the source of a signal?
A
B) near end cross talk
10
Q
At what layer of the OSI model do the IP, ICMP, and ARP protocols operate?
A
D) Network
11
Q
The standard that describes uniform, enterprise-wide cabling systems, regardless of who manufactures or sells the various parts used in the system, can be referred to by what two options below?
A
B) TIA/EIA-568
D) structured cabling
12
Q
A device that is responsible for modulating digital signals into analog signals, and demodulating analog signals into digital signals at the receiving end, is known as?
A
A) a modem
13
Q
An open electrical circuit as a result of a failed circuit breaker is considered to be what type of failure system?
A
B) Fail-close
14
Q
Ethernet exists at what layer of the OSI model?
A
B) Layer 2
15
Q
What IPv4 protocol handles multicasting for tasks such as videoconferencing or teleconferencing?
A
D) IGMP
16
Q
What are the two main Transport Layer protocols?
A
C) TCP
D) UDP
17
Q
Which protocol below is used to make an initial connection between hosts for transferring multimedia data, relying on other protocols once a connection is established?
A
B) SIP
18
Q
The radius of the maximum arc into which you can loop a cable without impairing data transmission is known as what option below?
A
C) bend radius
19
Q
Which type of multiplexing is defined by wavelength instead of frequency?
A
A) CWDM
20
Q
What type of power flaw involves a fluctuation in voltage levels caused by other devices on the network or by EMI?
A
C) noise
21
Q
What address does ARP work in conjunction with IPv4 to discover? (2)
A
B) MAC
D) physical
22
Q
What routing protocol criteria is defined as the time it takes to recognize a best path change in the event of a network outage?
A
B) convergence time
23
Q
What is the industry standard for rack height in rack units?
A
C) 42U
24
Q
What type of routing protocol enables routers to communicate beyond neighboring routers, allowing each router to create a map of an entire network?
A
B) link state
25
Which of the following are types of entries an ARP table contains? (2)
A) Static
| D) Dynamic
26
What top level domain is used for the air-transport industry?
B) .aero
27
What two items below are commonly expressed as bits transmitted per second?
C) throughput
| D) bandwidth
28
Select the two terms below that are used to describe a UPS that provides continuous voltage to a device by switching virtually instantaneously to the battery when it detects a loss of power;
B) standby UPS
| C) standby power supply
29
What do the first 24 bits of a MAC address represent?
A) Organizationally Unique Identifier
30
In what network topology are devices daisy-chained together in a single line?
A) Bus Topology
31
What type of power converter changes the voltage of an AC current, such as when power over the main line from an electric company is changed before being delivered to a home?
C) transformer
32
If the use of a pre-existing Ethernet infrastructure is desired for a SAN, what Transport Layer protocol should be utilized?
B) iSCSI
33
The number of times that a wave's amplitude cycles from its starting point, through its highest amplitude and its lowest amplitude, and back to its starting point over a fixed period of time, is known as what term below?
B) frequency
34
In Linux systems, what file contains the settings for the DHCP service?
A) dhcpd.conf
35
Using DWDM, a single fiber can carry between what two numbers of channels?
B) 80
| C) 160
36
What range of ports is referred to as the "well-known" range of ports?
A) 0-1023
37
How many cable pairs are needed for 1000Base-T transmission over CAT5e cable?
B) 4
38
What is the name for a client-server model with one server and many clients, such as when an application is used to watch a live sports event?
A) Multicast Distribution
39
Select the two Transport Layer protocol that are used by SANs:
A) Fibre Channel
| B) iSCSI
40
Any computer or device on a network that can be addressed on the local network is referred to as a:
B) Node
41
Using the same network to deliver multiple types of communications services, such as video, voice, and fax is known as:
B) Convergence
42
Select the name of the free, open source software that is by far the most popular DNS server software:
B) BIND
43
What netstat command option lists only current connections, including IP addresses and port numbers?
C) -n
44
What are the last two parts of a host name known as?
C) Domain Name
45
What parameter can be combined with the traceroute command to instruct it to use ICMP echo requests instead of UDP datagrams?
C) -i
46
How many clusters of root servers exist?
C) 13
47
What command below can be used to display a complete summary of all network interfaces in a Windows computer?
B) ipconfig /all
48
One watt is equal to how many volt-amps?
A) 1.4
49
An IPv6 address consists of how many bits?
D) 128
50
What is the maximum supported throughput of a CAT6 cable?
C) 10 Gbps
51
What cable type comes in two different modes, single mode and multimode?
C) Fiber Optic
52
Select the maximum allowable distances for horizontal wiring for a span that connects a data jack on a wall to a data closet, and for a span that connects a workstation to the data jack, respectively:
B) 90 m
| C) 10 m
53
Where is a demarc located in relation to the structured cabling of an enterprise environment?
A) in the Main Distribution Frame (MDF)
54
What happens when a router receives a packet with a TTL of 0?
B) The router drops the packet and sends an ICMP TTL expired message back to the host
55
The process of adding a header to the data inherited from the layer above is called what option below?
B) Encapsulation
56
Which layers of the OSI model are all routers able to interpret?
C) 3
| D) 4
57
What protocol is commonly used to request configuration files from another computer?
D) TFTP
58
Which method of transmission allows signals to travel in both directions over a medium but in only one direction at a time?
B) half duplex
59
Select the layer of the OSI model that is responsible for reformatting, compressing, and/or encrypting data in a way that the application on the receiving end can read:
B) Presentation
60
WDM divides a beam of light into how many different wavelengths or colors?
D) 40
61
What command can be used on a Cisco router to view the routing table?
D) show ip route
62
Phone companies make use of what type of multiplexing in order to allow for phone services and DSL services over the same line?
B) FDM
63
What is the maximum supported throughput and bandwidth / signal rate of Cat 5e?
B) 1000 Mbps
| D) 350 MHz
64
What is the maximum distance for 10GBase-ER and 10GBase-EW on a segment of single mode fiber?
D) 40km
65
When viewing the routing table on a UNIX system, what flag indicates if a route is a usable route?
D) U
66
If a Network layer protocol is aware that a packet is larger than the maximum size for its network, it will divide the packet into smaller packets in a process known as:
B) Fragmentation
67
During termination of twisted pair cabling, what should be done to ensure minimal cross talk is introduced?
A) No more than 1 inch of the cable should be exposed
68
The IP protocol relies on what other protocol to guarantee delivery of data?
C) TCP
69
In order to simplify console access to computers in a rack, what device is typically used to provide a central portal for all devices on the rack?
A) KVM switch
70
Standard PoE devices must be provided with how much power in order to function?
C) 15.4 watts
71
Which option below reflects the standard impedance of an RG-6 cable?
D) 75 ohms
72
The most common multiplexing technology used in conjunction with fiber optics is which option below?
A) DWDM
73
A measure of a signal's strength at any given time is known as which term below?
A) amplitude
74
What two ipconfig commands below are used to show DNS resolver cache information and clear the name resolver cache?
C) ipconfig /displaydns
| D) ipconfig /flushdns
75
When using a Windows domain, what is the domain-level account for each user known as?
A) Global Account
76
Equipment racks most commonly come in what two widths?
C) 19 in frame
| D) 23 in frame
77
What two names are used to descibe the configuration in which internal and external DNS queries are handled by different DNS servers or by a single DNS server that is specially configured to keep internal and external DNS zones separate?
B) split DNS
| C) split-horizon DNS
78
A modern ASN consists of how many bits?
B) 32
79
What component of the backbone runs between a building's floors and can be used to connect an MDF and IDF or multiple IDFs?
C) vertical cross connect
80
A port number, which identifies an application on a host, exists at what level of the OSI model?
B) Transport
81
Which of the following options is not a likely source of electromagnetic interference?
C) fiber optic cables
82
Static electricity can cause what two types of damage in electronic components?
B) Catastrophic failure
| C) Upset failure
83
What is NOT one of the three characteristics of TCP in its role as a reliable delivery protocol?
C) Framing
84
What is the name of the protocol data unit (PDU) of the Data Link layer?
D) Frame
85
Which of the following connectors is the most common for mutlimode fiber?
D) MT-RJ
86
What term below is used to describe the outer-most layer of protective covering of a coaxial cable?
A) sheath
87
What is the maximum frame size for Ethernet ll frames on a VLAN?
C) 1522 bytes
88
What is the minimum category of UTP cable required in order to support Gigabit speeds?
C) Cat 5e
89
What TCP field below allows the receiving node to determine whether a TCP segment is corrupted during transmission?
A) checksum
90
What two types of IP addresses are used on the internet?
A) IPv4
| B) IPv6
91
What field in an IPv4 packet informs routers the level of precedence they should apply when processing an incoming packet?
A) Differentiated Services (DiffServ)
92
What mail protocol is used to send mail messages to a server?
C) SMTP
93
What two connector types are typically used to terminate RG-6 and RG-59 cables?
A) f-connectors
| B) BNC
94
Since cable TV and cable internet can share the same coaxial cable, they are considered to be what type of technology?
A) broadband
95
When selecting a punch down block, what block type is more suitable for data connections?
D) 110 block
96
Ethernet is an example of what type of technology?
B) baseband
97
What layer of the OSI model describes how data between applications is synced and recovered if messages don't arrive intact at the receiving application?
C) Session Layer
98
What are two encryption protocols commonly used with the Hypertext Transfer Protocol?
B) TLS
| C) SSL
99
Which two protocols can be used to gain remote access specifically to a server's command line interface, securely and unsecurely?
A) Telnet
| B) SSH
100
HTTP, IMAP4, FTP, and Telnet are all examples of protocols that operate at what layer of the OSI model?
D) Layer 7
101
Using a form of transmission that allows multiple signals to travel simultaneously over one medium is known as which of the following options?
B) multiplexing
102
What command on Linux will display TCP/IP information associated with every interface on the device?
B) ifconfig -a
103
Which of the following is not a task handled by a router?
A) A router forwards broadcasts over the network
104
What Ethernet standard below is also referred to as "thinnet"?
B) 10Base2
105
Frequencies used to convey speech over telephone lines fall between what two frequencies below?
B) 300 Hz
| C) 3.3 KHz
106
What utility is used to verify that TCP/IP installed, bound to the NIC, configured correctly, and communicating with the network?
C) ping
107
The Network Time Protocol service uses what port number?
C) UDP 123
108
A standard network switch operates at what layer of the OSI model?
B) Layer 2
109
Select the protocol below that is used to synchronize clocks on computers on a network:
B) NTP
110
What two mail delivery protocols below can be used by a client application to receive e-mail from a server?
A) POP3
| D) IMAP4
111
The device where a telecommunications service provider network ends and an organization's network begins is referred to as what option below?
A) Demarc
112
How far away from fluorescent lights or other sources of EMI should cable be installed?
A) at least 3 ft
113
The proper handling procedures for substances such as chemical solvents are typically outlined in which of the following options?
D) Material Safety Data Sheet (MSDS)
114
A loopback IP address begins with what number?
B) 127
115
What versions of the IP protocol are used on networks today?
B) IPv4
| C) IPv6
116
What physical network topology consists of all connected devices connecting to one central device, such as a switch?
D) Star Topology
117
Which method of transmission allows signals to travel in both directions over a medium simultaneously?
C) full-duplex
118
At what layer of the OSI model would a TCP or UDP header be added to a payload?
B) Layer 4
119
Traditional MAC addresses are broken into two parts. Name these two parts.
A) block ID
| D) device ID
