[单选题]标准访问控制列表应被放置的最佳位置是在（）。

正确答案 ：B

越靠近数据包的目的地越好

[单选题]An administrator issues the show ip interface s0/0 command and the output displays that interface Serial0/0 is up, line protocol is up.What does "line protocol is up" specifically indicate about the interface?

正确答案 ：C

Keepalives are being received on the interface.

解析：解析：Explanation:

[单选题]能够分配给设备的IP，应该是（）

正确答案 ：A

网络有效IP

[单选题]下面对Cisco2621路由器和Cisco2501路由器描述中，错误的是（）

正确答案 ：C

Cisco2501上提供一个100Mbit/s的快速以太网端口

[单选题]What is the purpose of the spanning-tree algorithm in a switched LAN?

正确答案 ：C

To prevent switching loops in networks with redundant switched paths.

解析：解析：Explanation:STPisusedinLANswithredundantpathsorroutestopreventloopsinalayer2switchedorbridgedLAN.IncorrectAnswers:A,B:TheprimarypurposeofSTPistopreventloops,notformonitoringormanagementofswitchesorVLANs.D.VLANsareusedtosegmentaLANintomultiplecollisiondomains,buttheSTPprocessalonedoesnotdothis.E.Routersareusedtopreventroutingloopsatlayer3oftheOSImodel.STPoperatesatlayer2.

[多选题]Which three statements are true about the operation of a full-duplex Ethernet network, which is being used in the Ezonexam LAN? (Choose three)

正确答案 ：BCE

The host network card and the switch port must be capable of operating in full-duplex mode.

There are no collisions in full-duplex mode.

A dedicated switch port is required for each full-duplex node.

解析：解析：Explanation:

[单选题]哪个命令可以成功测试网络：()

正确答案 ：B

Routerping192.5.5.30

[单选题]The IP network 210.106.14.0 is subnetted using a /24 mask. How many usable networks and host addresses can be obtained from this?

正确答案 ：A

1 network with 254 hosts

解析：解析：Explanation:Asubnetwith24bitsonwouldbe255.255.255.0.SincethisisaclassCnetwork,thissubnetcanhaveonly1networkand254usablehosts.

[单选题]把访问权限表应用到路由器端口的命令是：()

正确答案 ：B

ip access-group 101 out

[多选题]CDP is being used throughout the Ezonexam network. What are two reasons why the Ezonexam network administrator would use CDP? (Choose two)

正确答案 ：BD

To obtain the IP Address of a connected device in order to telnet to the device

To verify Layer 2 connectivity between two devices when Layer 3 fails

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