單項選擇題Given an IP address 172.16.28.252 with a subnet mask of 255.255.240.0, what is the correct network addres?()

A. 172.16.16.0
B. 172.16.24.0
C. 172.16.0.0
D. 172.16.28.0


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1.單項選擇題Which command can be used to verify the DLCI destination address in a Frame Relay static configuration?()

A. show frame-relay end-to-end
B. show frame-relay map
C. show frame-relay lmi
D. show frame-relay pvc

3.單項選擇題In which circumstance are multiple copies of the same unicast frame likely to be transmitted in a switched LAN?()

A. after broken links are re-established
B. in an improperly implemented redundant topology
C. when upper-layer protocols require high reliability
D. during high traffic periods
E. when a dual ring topology is in use

4.單項選擇題Which command sets and automatically encrypts the privileged enable mode password?()

A. enbale password c1sco
B. secret enable c1sco
C. password enable c1sco
D. enable secret c1sco

5.單項選擇題Which statement is true?()

A. An IPv6 address is 64 b long and is represented as hexadecimal characters.
B. An IPv6 address is 32 b long and is represented as decimal digits.
C. An IPv6 address is 128 b long and is represented as decimal digits.
D. An IPv6 address is 128 b long and is represented as hexadecimal characters.

6.單項選擇題When upgrading the IOS image, the network administrator receives the exhibited error message. What could be the cause of this error?()

A. The new IOS image is too large for the router flash memory.
B. The TFTP server is unreachable from the router.
C. The new IOS image is not correct for this router platform.
D. The IOS image on the TFTP server is corrupt.
E. There is not enough disk space on the TFTP server for the IOS image.

7.單項選擇題

This graphic shows the results of an attempt to open a Telnet connection to router ACCESS1 from router Remote27. Which of the following command sequences will correct this problem? ()

A. ACCESS1(config)# line console 0 ACCESS1(config-line)# password cisco
B. Remote27(config)# line console 0 Remote27(config-line)# login Remote27(config-line)# password cisco
C. ACCESS1(config)# line vty 0 4 ACCESS1(config-line)# login ACCESS1(config-line)# password cisco
D. Remote27(config)# line vty 0 4 Remote27(config-line)# login Remote27(config-line)# password cisco
E. ACCESS1(config)# enable password cisco
F. Remote27(config)# enable password cisco

8.單項選擇題

A network administrator is troubleshooting the OSPF configuration of routers R1 and R2. The routers cannot establish an adjacency relationship on their common Ethernet link. The graphic shows the output of the show ip ospf interface e0 command for routers R1 and R2. Based on the information in the graphic, what is the cause of this problem?()

A. The OSPF area is not configured properly.
B. The priority on R1 should be set higher.
C. The cost on R1 should be set higher.
D. The hello and dead timers are not configured properly.
E. A backup designated router needs to be added to the network.
F. The OSPF process ID numbers must match.

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When you are troubleshooting an ACL issue on a router,which command can help you to verify which interfaces are affected by the ACL?()

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At which layer of the OSI model dose PPP perform?()

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The network administrator cannot to switch 1 over a telnet session,although the hosts attached to switch 1 can ping the interface Fa0/0 of the router.Given the information in the graphic and assuming that the router and switch2 are configured properly,which of the following commands should be issued on switch 1 to correct this problem?()

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Which statement is true, as relates to classful or classless routing?()

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While troubleshooting a network problem,a technician discovers that the current copy of the Cisco IOS is outdated and needs to be updated.Which of the following commands would the technician issue to replace the Cisco router IOS with the newer version?()

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Which command displays the CHAP authentication process as it occurs between two routers?()

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Which command is used to display the collection of OSPF link states?()

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A network administrator needs to configure a serial link between the main office and a remote location.The router at the remote office is a non-cisco router. How should the network administrator configure the serial interface of the main office router to make the connection?()

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After the show ip route command has been entered,the follwing routes are displayed.Which route will not be entered into the routing table of a neighboring router?()

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A network administrator is trying to add a new router into an established OSPF network.The networks attached to the new router do not appear in the routing tables of the other OSPF routers.Given the information in the partial configuration shown below,what configuration error is causing this problem?()Router(config)#router ospf 1Router(config-router)#network 10.0.0.0 255.0.0.0 area 0

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