Cisco Chapter 6 review

Which statement about router interfaces is true?

A configured and activated router interface must be connected to another device in order to operate.

A technician is configuring a router that is actively running on the network. Suddenly, power to the router is lost. If the technician has not saved the configuration, which two types of information will be lost? (Choose two.)

ARP cache & routing table

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.​

Which two files, if found, are copied into RAM as a router with the default configuration register setting boots up? (Choose two.)

IOS image file, startup configuration

Match field names to the header where they would be found

IPv4: Total Length and Flags IPv6: Traffic Class and Flow Label

What is a service provided by the Flow Label field of the IPv6 header?

It informs network devices to maintain the same path for real-time application packets

Which two interfaces will allow access via the VTY lines to configure the router? (Choose two.)

LAN and WAN interfaces

Refer to the exhibit. Match the packets with their destination IP address to the existing interfaces on the router.

Packets with a destination of 172.17.6.15 are forwarded through Fa0/0. Packets with a destination of 172.17.10.5 are forwarded through Fa1/1. Packets with a destination of 172.17.12.10 are forwarded through Fa1/0. Packets with a destination of 172.17.14.8 are forwarded through Fa0/1. Because network 172.17.8.0 has no entry in the routing table, it will take the gateway of last resort, which means that packets with a destination of 172.17.8.20 are forwarded through Serial0/0/0. Because a gateway of last resort exists, no packets will be dropped.

Fill in the blank. In a router,_____is the nonvolatile memory where the diagnostic software, the bootup instructions, and a limited IOS are stored.

ROM

Match the configuration mode with the command that is available in that mode

The enable command is entered at the R1> prompt. The login command is entered at the R1(config-line)# prompt. The copy running-config startup-config command is entered at the R1# prompt. The interface fastethernet 0/0 command is entered at the R1(config)# prompt.

A computer has to send a packet to a destination host in the same LAN. How will the packet be sent?

The packet will be sent directly to the destination host.

Does the router have enough RAM and flash memory to support the new IOS?

The router has enough RAM and flash memory for the IOS upgrade

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.

A packet leaving PC-1 has to traverse____ hops to reach PC-4.​

Three

After troubleshooting a router, the network administrator wants to save the router configuration so that it will be used automatically the next time that the router reboots. What command should be issued?

copy running-config startup-config

Which IPv4 header field is responsible for defining the priority of the packet?

differentiated services

Which three commands are used to set up a password for a person who attaches a cable to a new router so that an initial configuration can be performed? (Choose three.)

password cisco, line console 0, login

Which two commands can be used on a Windows host to display the routing table? (Choose two.)

route print, netstat -r

Which command displays a summary chart of all router interfaces, their IP addresses, and their current operational status?

show ip interface brief

During the process of forwarding traffic, what will the router do immediately after matching the destination IP address to a network on a directly connected routing table entry?

switch the packet to the directly connected interface

A technician is manually configuring a computer with the necessary IP parameters to communicate over the corporate network. The computer already has an IP address, a subnet mask, and a DNS server. What else has to be configured for Internet access?

the default gateway address

When connectionless protocols are implemented at the lower layers of the OSI model, what are usually used to acknowledge the data receipt and request the retransmission of missing data?

upper-layer connection-oriented protocols

When would the Cisco IOS image held in ROM be used to boot the router?

when the full IOS cannot be found