chapter 6: network layer
Which statement about router interfaces is true?
A configured and activated router interface must be connected to another device in order to operate.*
Refer to the exhibit. Fill in the blank.
A packet leaving PC-1 has to traverse "three" hops to reach PC-4.
Why is NAT not needed in IPv6?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.*
In a router, "ROM " is the nonvolatile memory where the diagnostic software, the bootup instructions, and a limited IOS are stored.
In a router, "ROM " is the nonvolatile memory where the diagnostic software, the bootup instructions, and a limited IOS are stored.
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.*
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.*
Which two interfaces will allow access via the VTY lines to configure the router? (Choose two.)
WAN interfaces* LAN interfaces*
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
copy running-config startup-config
Which IPv4 header field is responsible for defining the priority of the packet?
differentiated services
Which type of static route that is configured on a router uses only the exit interface?
directly connected static route*
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*
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.)
routing table* ARP cache*
Which command displays a summary chart of all router interfaces, their IP addresses, and their current operational status?
show ip interface brief
Which two files, if found, are copied into RAM as a router with the default configuration register setting boots up? (Choose two.)
startup configuration* IOS image file*
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
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*