Layer 3 Ch6

What is a service provided by the Flow Label field of the IPv6 header? It identifies the total length of the IPv6 packet. It limits the lifetime of a packet. It informs network devices to maintain the same path for real-time application packets. It classifies packets for traffic congestion control.

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

In a router, ___ is the nonvolatile memory where the diagnostic software, the bootup instructions, and a limited IOS are stored.

ROM

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. The packet will be sent only to the default gateway. The packet will be sent to the default gateway first, and then, depending on the response from the gateway, it may be sent to the destination host. The packet will first be sent to the default gateway, and then from the default gateway it will be sent directly to the destination host.

The packet will be sent directly to the destination host.

Which two interfaces will allow access via the VTY lines to configure the router? (Choose two.) console interfaces USB interfaces WAN interfaces LAN interfaces aux interfaces

WAN interfaces LAN interfaces

Which IPv4 header field is responsible for defining the priority of the packet?​ traffic class flow label flags differentiated services

differentiated services

Which two commands can be used on a Windows host to display the routing table? (Choose two.) netstat -s route print netstat -r tracert show ip route

route print netstat -r

Which command displays a summary chart of all router interfaces, their IP addresses, and their current operational status? show interfaces show version show ip route show ip interface brief

show ip interface brief

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 the MAC address the domain name of the organization the WINS server address

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? Transport layer UDP protocols upper-layer connection-oriented protocols connectionless acknowledgements Network layer IP protocols

upper-layer connection-oriented protocols

When would the Cisco IOS image held in ROM be used to boot the router? when the running configuration directs the router to do this during a normal boot process when the full IOS cannot be found during a file transfer operation

when the full IOS cannot be found

Which statement about router interfaces is true? Commands that apply an IP address and subnet mask to an interface are entered in global configuration mode. Once the no shutdown command is given, a router interface is active and operational. Router LAN interfaces are not activated by default, but router WAN interfaces are. A configured and activated router interface must be connected to another device in order to operate.

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

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.​ The end-to-end connectivity problems that are caused by NAT are solved because the number of routes increases with the number of nodes that are connected to the Internet. Because IPv6 has integrated security, there is no need to hide the IPv6 addresses of internal networks.​ The problems that are induced by NAT applications are solved because the IPv6 header improves packet handling by intermediate routers.​

Any host or user can get a public IPv6 network address because the number of available IPv6 addresses is extremely large.​

How do hosts ensure that their packets are directed to the correct network destination? They always direct their packets to the default gateway, which will be responsible for the packet delivery. They send a query packet to the default gateway asking for the best route. They search in their own local routing table for a route to the network destination address and pass this information to the default gateway. 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.​

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.​

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 startup-config flash copy running-config flash reload copy startup-config running-config copy running-config startup-config

copy running-config startup-config

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 vty 0 4 line console 0 interface fastethernet 0/0 enable secret cisco login

password cisco line console 0 login

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 Cisco IOS image file startup configuration bootstrap file

routing table ARP cache

Which two files, if found, are copied into RAM as a router with the default configuration register setting boots up? (Choose two.) POST diagnostics running configuration startup configuration IOS image file

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? look up the next-hop address for the packet discard the traffic after consulting the route table switch the packet to the directly connected interface analyze the destination IP address

switch the packet to the directly connected interface