Final exam 2de helft Flashcards
(52 cards)
A PC obtains its IP address from a DHCP server. If the PC is taken off the network for repair, what happens to the IP address configuration?
The configuration is permanent and nothing changes. The address lease is automatically renewed until the PC is returned. The address is returned to the pool for reuse when the lease expires. The configuration is held by the server to be reissued when the PC is returned.
The address is returned to the pool for reuse when the lease expires.
When planning for network growth, where in the network should packet captures take place to assess network traffic?
on as many different network segments as possible only at the edge of the network between hosts and the default gateway only on the busiest network segment
on as many different network segments as possible
A wireless host needs to request an IP address. What protocol would be used to process the request?
FTP
HTTP
DHCP
ICMP
SNMP
DHCP
Which example of malicious code would be classified as a Trojan horse?
malware that was written to look like a video game malware that requires manual user intervention to spread between systems malware that attaches itself to a legitimate program and spreads to other programs when launched malware that can automatically spread from one system to another by exploiting a vulnerability in the target
malware that was written to look like a video game
When applied to a router, which command would help mitigate brute-force password attacks against the router?
exec-timeout 30 service password-encryption banner motd $Max failed logins = 5$ login block-for 60 attempts 5 within 60
login block-for 60 attempts 5 within 60
A network technician suspects that a particular network connection between two Cisco switches is having a duplex mismatch. Which command would the technician use to see the Layer 1 and Layer 2 details of a switch port?
show mac-address-table show ip interface brief show interfaces show running-config
show interfaces
Where are Cisco IOS debug output messages sent by default?
Syslog server console line memory buffers vty lines
console line
A user is unable to reach the web site when typing http://www.cisco.com in a web browser, but can reach the same site by typing http://72.163.4.161. What is the issue?
default gateway DHCP TCP/IP protocol stack DNS
DNS
A company is expanding its business to other countries. All branch offices must remain connected to corporate headquarters at all times. Which network technology is required to support this requirement?
LAN MAN WAN WLAN
WAN
A home user is looking for an ISP connection that provides high speed digital transmission over regular phone lines. What ISP connection type should be used?
DSL
dial-up
satellite
cell modem
cable modem
DSL
How does quality of service help a network support a wide range of applications and services?
by limiting the impact of a network failure by allowing quick recovery from network failures by providing mechanisms to manage congested network traffic by providing the ability for the network to grow to accommodate new users
by providing mechanisms to manage congested network traffic
What source IP address does a router use by default when the traceroute command is issued?
the highest configured IP address on the router the lowest configured IP address on the router a loopback IP address the IP address of the outbound interface
the IP address of the outbound interface
After making configuration changes on a Cisco switch, a network administrator issues a copy running-config startup-config command. What is the result of issuing this command?
The new configuration will be stored in flash memory. The new configuration will be loaded if the switch is restarted. The current IOS file will be replaced with the newly configured file. The configuration changes will be removed and the original configuration will be restored.
The new configuration will be loaded if the switch is restarted.
Which connection provides a secure CLI session with encryption to a Cisco network device?
a console connection an AUX connection a Telnet connection an SSH connection
SSH
What function does pressing the Tab key have when entering a command in IOS?
It aborts the current command and returns to configuration mode. It exits configuration mode and returns to user EXEC mode. It moves the cursor to the beginning of the next line. It completes the remainder of a partially typed word in a command.
It completes the remainder of a partially typed word in a command.
What layer is responsible for routing messages through an internetwork in the TCP/IP model?
internet transport network access session
internet
Which statement accurately describes a TCP/IP encapsulation process when a PC is sending data to the network?
Data is sent from the internet layer to the network access layer. Packets are sent from the network access layer to the transport layer. Segments are sent from the transport layer to the internet layer. Frames are sent from the network access layer to the internet layer.
Segments are sent from the transport layer to the internet layer.
What unique address is embedded in an Ethernet NIC and used for communication on an Ethernet network?
host address
IP address
MAC address
network address
k layer
MAC address
Which procedure is used to reduce the effect of crosstalk in copper cables?
requiring proper grounding connections twisting opposing circuit wire pairs together wrapping the bundle of wires with metallic shielding designing a cable infrastructure to avoid crosstalk interference avoiding sharp bends during installation
twisting opposing circuit wire pairs together
During the encapsulation process, what occurs at the data link layer for a PC connected to an Ethernet network?
An IP address is added. The logical address is added. The physical address is added. The process port number is added.
The physical address is added.
What are two characteristics of Ethernet MAC addresses? (Choose two.)
They are globally unique. They are routable on the Internet. They are expressed as 12 hexadecimal digits. MAC addresses use a flexible hierarchical structure. MAC addresses must be unique for both Ethernet and serial interfaces on a device.
They are globally unique.
They are expressed as 12 hexadecimal digits.
If a device receives an Ethernet frame of 60 bytes, what will it do?
drop the frame process the frame as it is send an error message to the sending device add random data bytes to make it 64 bytes long and then forward it
drop the frame
Under which two circumstances will a switch flood a frame out of every port except the port that the frame was received on? (Choose two.)
The frame has the broadcast address as the destination address. The destination address is unknown to the switch. The source address in the frame header is the broadcast address. The source address in the frame is a multicast address. The destination address in the frame is a known unicast address.
The frame has the broadcast address as the destination address.
The destination address is unknown to the switch.
Which switching method has the lowest level of latency?
cut-through store-and-forward fragment-free fast-forward
fast-forward
