cyber units 8-10 review
What are two potential network problems that can result from ARP operation? (Choose two)
- Network attackers could manipulate MAC address and IP address mappings in ARP messages with the intent of intercepting network traffic - On large networks with low bandwidth, multiple ARP broadcasts could cause data communication delays
Which two types of IPv6 messages are used in place of ARP for address resolution?
- neighbor solicitation - neighbor advertisement
Which three commands are used to set up secure access to a router through a connection to the console interface? (Choose three)
- password cisco - login - line console 0
Under which two circumstances will a switch flood a frame out of every port except the port that the frame was received on? (Choose 2)
- the destination address is unknown to the switch - the frame has the broadcast address as the destination address
What are two functions of NVRAM (choose two)
- to retain contents when power is removed - to store the startup configuration file
What statement describes the function of the Address Resolution Protocol?
ARP is used to discover the MAC address of any host on the local network
What happens when the "transport input ssh" command is entered on the switch vty lines?
Communication between the switch and remote users is encrypted
A new network administrator has been asked to enter a banner message on a Cisco device. What is the fastest way a network administrator could test whether the banner is properly configured?
Exit privileged EXEC mode and press "Enter"
Refer to the exhibit. Consider the IP address configuration shown from PC1. What is a description of the default gateway address?
It is the IP address of the Router1 interface that connects the PC1 LAN to Router1
What IPv4 header field identifies the upper layer protocol carried in the packet?
Protocol
Match the configuration mode with the command that is available in that mode: | copy running-config startup-config |
R1#
Match the configuration mode with the command that is available in that mode: | interface fastethernet 0/0 |
R1(config)#
Match the configuration mode with the command that is available in that mode: | login |
R1(config-line)#
Open the PT activity. Perform the tasks in the activity instructions and then answer the question. Which interfaces in each router are active and operational?
R1: G0/0 and S0/0/0 R2: G0/1 and S0/0/0
Match the configuration mode with the command that is available in that mode: | enable |
R1>
A network technician issues the arp -d+ command on a PC after the router that is connected to the LAN is configured. What is the result after this command is issued?
The ARP cache is cleared
What information does the loopback test provide?
The TCP/IP stack on the device is working correctly
A computer can access devices on the same network but cannot access devices on other networks. What is the probable cause of this problem?
The computer has an invalid default gateway address
A router boots and enters setup mode. What is the reason for this?
The configuration file is missing from NVRAM
Within a production network, what is the purpose of configuring a switch with a default gateway address?
The default gateway address is used to forward packets originating from the switch to remote networks
What will happen if the default gateway address is incorrectly configured on a host?
The host cannot communicate with hosts in other networks
The global configuration command "ip default-gateway 172.16.100.1" is applied to a switch. What is the effect of this command?
The switch can be remotely managed from a host on another network
Refer to the exhibit. The exhibit shows a small switched network and the contents of the MAC address table of the switch. PC1 has sent a frame addressed to PC3. What will the switch do with the frame?
The switch will forward the frame to all ports except port 4
Which statement describes the treatment of ARP requests on the local link?
They are received and processed by every device on the local network
How do hosts ensure that their packets are directed to the correct network destination?
They have to keep their own local routing table that contains a route to the loopback interface, a local network route, and a remote default route
Why is NAT not needed in IPv6?
any host or user can get a public IPv6 network address because the number of available IPv6 addresses is extremely large
Match the commands to the correct actions: | Router(config)# "hostname CL1" |
configures a name on the router
What is a basic characteristic of the IP protocol?
connectionless
What is one advantage that the IPv6 simplified header offers over IPv4?
efficient packet handling
A network administrator requires access to manage routers and switches locally and remotely. Match the description to the access method: | console |
preferred out-of-band access method
Match the commands to the correct actions: | Router(config-line)# "password class" |
provides security on the console
A network administrator requires access to manage routers and switches locally and remotely. Match the description to the access method: | SSH |
remote access method that uses encryption
A network administrator requires access to manage routers and switches locally and remotely. Match the description to the access method: | AUX |
remote access via a dialup connection
Which term describes a field in the IPv4 packet header that contains a 32-bit binary value associated with an interface on the sending device?
source IPv4 address
Refer to the exhibit. PC1 attempts to connect to File_server1 and sends an ARP request to obtain a destination MAC address. Which MAC address will PC1 receive in the ARP reply?
the MAC address of the G0/0 interface on R1
What is the effect of using the "Router# copy running-config startup-config" command on a router?
the contents of NVRAM will change
Which parameter does the router use to choose the path to the destination when there are multiple routes available?
the lower metric value that is associated with the destination network
