最新题库的问题寻求正确答案 谢谢了

xiaopei233

我有几道问题 想求正确的答案啊 各位看看有什么见解啊

45. Which of the following correctly describe steps in the OSI data encapsulation process? (Choose two.)

A. The transport layer divides a data stream into segments and may add reliability and flow control

information.

B. The data link layer adds physical source and destination addresses and an FCS to the segment.

C. Packets are created when the network layer encapsulates a frame with source and destination host

addresses and protocol-related control information.

D. Packets are created when the network layer adds Layer 3 addresses and control information to a

segment.

E. The presentation layer translates bits into voltages for transmission across the physical link.

Answer: AD

还是~~~~~AC？

121. Which command reveals the last method used to powercycle a router?

A. show reload

B. show boot

C. show running-config

D. show version

Answer: D

还是~~~~~~~~~~A？

126. When troubleshooting a Frame Relay connection, what is the first step when performing a loopback

test?

A. Set the encapsulation of the interface to HDLC.

B. Place the CSU/DSU in local-loop mode.

C. Enable local-loop mode on the DCE Frame Relay router.

D. Verify that the encapsulation is set to Frame Relay.

Answer: A

~还是~~~~~~~~D？

135. What two things will a router do when running a distance vector routing protocol? (Choose two.)

A. Send periodic updates regardless of topology changes.

B. Send entire routing table to all routers in the routing domain.

C. Use the shortest-path algorithm to the determine best path.

D. Update the routing table based on updates from their neighbors.

E. Maintain the topology of the entire network in its database.

Answer: AD
还是~~~~~~~~~~AB？

b 还是c？

yangyu844512

你不是问过了   按照题库的答案  没问题