1、
![](https://img.laitimes.com/img/_0nNw4CM6IyYiwiM6ICdiwiInBnauMDM3EDO2MzMzATMyETOwUDM4ADMy8CX1ADOwAjMvwFduVWboNWY0RXYvwVbvNmLvR3YxUjL4M3Lc9CX6MHc0RHaiojIsJye.jpg)
1 Router_B (192.168.2.2) 16 msec 16 msec 16 msec
2 * * *
3 * * *
What can be concluded about the network shown in the graphic based on the output given?• Network 192.168.5.0 is missing from the routing table on Router
• There is a problem with the connection between Router B and Router C.
• Router C is not running CDP.
• Some of the routers are non-Cisco devices.
• Router B was not able to return ICMP TEMs to Router A
2、Which of the following would be the default administrative distance of a static IP route that references the IP address of the next hop?• 0
• 1
• 5
• 20
3、After issuing the show interfaces command, a technician notices the line "Serial1 is down, line protocol is down" in the output. Which of the following are possible reasons for this message output? (Choose three.)• There is a mismatch in the encapsulation type on both ends of the link.
• A Layer 1 issue exists.
• An interface problem exists.
• The clockrate was not set during configuration.
• There is no usable media for the protocol.
• Keepalive messages are not being sent.
4、Which three correctly pair a routing metric with its description? (Choose three.)
• hop count - the number of routers traversed to reach a destination
• bandwidth - the amount of time it takes a packet to travel a link
• load - the amount of activity on a link
• delay - the link speed
• reliability - the error rate on a link
5、• There could be Layer 3 addressing problems.
• There could be a problem with faulty telephone equipment.
• The router hardware could be defective.
• There is an incorrectly configured encapsulation on the interface.
• There could be a problem with the cabling.
6、Which ICMP message type notifies source hosts that a receiving host or network is not available?
• time exceeded
• redirect
• destination unreachable
• source quench
• parameter problem
• echo reply
7、The show interfaces command provides line and protocol status information. Which of the following conditions would never occur in the output of this command?
• serial1 is up, line protocol is up
• serial1 is up, line protocol is down
• serial1 is down, line protocol is down
• serial1 is down, line protocol is up
• serial1 is administratively down, line protocol is down
8、
• upper-layer application problems
• domain name system problems
• IP addressing problems on the HAR router
• clock rate problems on the HAR router serial interface
• ICMP connectivity problems
9、The network administrator is using a PC to access a router via the router console port. Both the PC and the router are powered on and a cable has been connected between them. However, a session cannot be established. Which steps might fix this problem? (Choose two.)• Verify the cable is properly connected at each end.
• Reseat the network card in the PC.
• Verify the cable is the correct type.
• Verify that a password has been set on the console line.
• Check the transceiver for link lights.
• Reseat the console card on the router
10、Which command will display routing table information about all known networks and subnetworks?• Router# show ip interfaces
• Router# show ip connections
• Router# show ip route
• Router# show ip networks
11、A network technician has discovered that a router in the network can no longer be reached. The technician attempts to verify Layer 1 functionality, but is unable to physically inspect the cables. Which command can be used to determine the type of cable connected to the router?
• Router# show interfaces
• Router# show controllers serial
• Router# show ip protocol
• Router# show version
• Router# show running-config
12、During the lookup process when forwarding a packet, a router checks its routing table for the best path to the destination. If a route has an administrative distance of 0, what does this indicate to the router?
• The packet should be discarded.
• The destination is unreachable.
• The destination is a directly connected network.
• The source of the update for that route is unreliable.
13、Which command will verify the functionality of all seven layers of the OSI model on a network host?
• ping
• debug
• telnet
• traceroute
14、•There is an incorrect encapsulation configured on the interface.
•There could be an interruption in the line by the service provider.
•There is a faulty switch or CSU/DSU.
•There is noise on the serial line.
15、
• R 192.168.5.2[120/1] via 192.168.15.0, 00:00:09, Serial0
• R 192.168.15.0[120/1] via 192.168.5.2, 00:00:13, Serial1
• R 192.168.15.0[120/1] via 192.168.5.1, 00:00:13, Serial0
• R 192.168.5.1 [120/1] via 192.168.5.2 00:00:29, Serial1
R 192.168.15.0 [120/1] via 192.168.5.2, 00:00:29, Serial1
• R 192.168.5.1 [120/1] via 192.168.5.2 00:00:18, Serial0
R 192.168.15.2 [120/1] via 192.168.5.2, 00:00:18, Serial
16、Which items would be displayed when the show ip protocols command is executed? (Choose three.)• sources of routing updates
• networks being advertised
• routing protocol up or down
• configured routed protocols
• Layer 2 status of the interface
• update timer values
17、Which two are true regarding the debug commands? (Choose two.)• Debug commands may be issued from the user EXEC prompt.
• The command undebug all will turn off all debug operations.
• By default, the router sends the debug output and messages to the telnet session.
• The high processor overhead incurred using debug may disrupt normal router operation.
• The debug all command provides a summary view of router activity and can be used frequently for troubleshooting.
• The show debugging command will display current events such as traffic on an interface and error messages generated by nodes on the network.
18、A network administrator suspects that a network is not being included in the routing updates. Which command will provide information on when the next update is due and which networks are advertised in the update?• Router# show ip protocols
19、Which of the following is a problem at the physical layer of the OSI model?
• incorrect file formatting
• incorrect encapsulation on a serial interface
• incorrect routing protocol
• incorrect cable type
20、
• D, SWH-2
• A, B, D
• SWH-1, SWH-2
• B, D
• SWH-1, A, B
• A, B, D, SWH-1, SWH-2
21、Which of the following are advantages of using a static route? (Choose three.)• secure operation
• highly adaptable
• low maintenance configuration
• low processor overhead
• precise control of path selection
22、Which of the following commands can be used to statically configure default routes? (Choose two.)
• ip static-route
• ip route
• ip network-route
• ip default-network
• ip default-static
23、Why does a router build a routing table? (Choose two.)
• to list available routes for forwarding data
• to map local Layer 2 addresses to the remote Layer 3 destination address
• to dynamically send periodic updates regarding the router's status
• to prevent routing loops when redundant links are added to the network
• to select the best path to a destination
24、Which of the following lines from the show interfaces output would indicate a Layer 2 problem?
• Serial1 is up, line protocol is up.
• Serial1 is up, line protocol is down.
• Serial1 is down, line protocol is down.
• Serial1 is administratively down, line protocol is down.