牛课网思科认证CCIE考试模拟试题20

思科认证CCIE考试模拟试题20

牛课网

11-21

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1.With regard to ISDN, which of the following are true? (Choose all that apply.)
A. Legacy DDR can use port information to define interesting traffic.
B. Legacy DDR can configure multiple dialer configurations on the same interface.
C. Legacy DDR can use ACLs to define interesting traffic.
D. HDLC or PPP can be used to encapsulate ISDN D channel information.
E. The BRI interfaces on ISDN routers with dialer profiles configured cannot belong
to multiple dialer pools.
F. Dialer profiles cannot use ACLs to define interesting traffic.
- BSCI

2.You are the network administrator at ABC.com. ABC has a switched network. You want to control the designation of the spanning-tree root bridge in the ABC network. What should you do?
A. By enabling uplink-fast on the ports of the desired switch.
B. By lowering the bridge priority on the desired switch.
C. By setting a lower MAC address on the designated switch.
D. By raising the bridge ID on one switch.

3.You are a technician at ABC. You receive a report from several ABC users who
complain that they get slow responses when sending and receiving email, especially
when browsing the Internet. You investigate the complaint by checking the output
of a ping command issued from her computer and find that it indicates intermitted
success and failures messages, when attempting to contact the email server. A
tracert to the corporate Internet gateway router shows high latency and occasional
time out messages.
What would be the most effective troubleshooting approach if you are to determine
the cause of the slow response time?
A. Bottom-up approach
B. Random access approach
C. Divide and conquer approach
D. Top-down approach
E. Top-down rule-out approach

4.You are a technician at ABC.com. Your newly appointed ABC trainee wants to
know what features make OSPF more suitable than RP in large network installations.
What would your reply be? (Choose all that apply.)
A. Diffusing Update Algorithm
B. No hop count limitation
C. Higher routing update overhead
D. Faster convergence
E. Lower routing update overhead

5.You are the network administrator at ABC. You are troubleshooting a network
problem. You want to trace the route to a Unix workstation that you want to reach
through the Internet. However, Traceroute does not work.
Currently, there is an inbound access-list applied to the serial interface on
Router 1. An entry in the access-list states "access-list 101 permit tcp any any".
What access-list
entry may you need to be added to the access-list in order to get traceroute to
work?
A. access-list 101 permit udp any any
B. access-list 101 permit icmp any any time-exceeded access-list 101 permit icmp
any any port-unreachable
C. access-list 101 permit icmp any any time-exceeded access-list 101 permit icmp
any any net-unreachable
D. access-list 101 permit icmp any any echo access-list 101 permit icmp any any

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