[单选题]OSI七层模型中，“段”是哪一层数据封装的名称（）

正确答案 ：D

传输层

[单选题]要把交换机的配置文件保存到tftp服务器，应使用的命令为（）

正确答案 ：B

copy running-configt ftp

[单选题]路由器上端口fa0/0,其最大传输速率是（）Mbit/s

正确答案 ：C

100

[单选题]While troubleshooting a connectivity problem on the network, you issue the ping command from your PC command prompt, but the output shows "request times out."At which OSI layer is this problem associated with?

正确答案 ：E

The network layer

解析：解析：Explanation:

[多选题]As a Ezonexam trainee you are required to set the default gateway on a Cisco switch to the IP address of 192.168.1.115. Which IOS command should you use?

正确答案 ：ABCD

TestKSwitch(config) ip route-default 192.168.1.115

TestKSwitch(config) ip default-gateway 192.168.1.115

TestKSwitch(config) ip route 192.168.1.115 0.0.0.0

TestKSwitch(config) ip default-network 192.168.1.115

解析：解析：Explanation:

[单选题]配置路由器时，封装PPP协议的命令是：()

正确答案 ：A

encap ppp

[多选题]Using a subnet mask of 255.255.255.224, which of the IP addresses below can you assign to the hosts on this subnet? (Select all that apply)

正确答案 ：CDE

92.11.178.93

134.178.18.56

192.168.16.87

解析：C,D,E 解析：Explanation:

[单选题]After connecting a PC to an available port on a switch, you find that the PC can not access any of the resources on the LAN. No other PC's connected to the switch appear to be having any issues. What is the most likely cause for this problem?

正确答案 ：B

The host switch port is assigned to the incorrect VLAN

解析：解析：Explanation:VirtualLANsbreakupbroadcastdomainsinalayer-twoswitchedinternetwork.IfahostisinadifferentVLANthenthenetworkservicesitneedstouse,thepacketsmustgothrougharouter.Ifroutingdoesnottakeplace,thePCwillbeunabletocommunicatewithanyotherdevicesnotinthesameVLAN.AnswerBisthebestanswerforthisquestion.IncorrectAnswers:A.ThePCisunabletocommunicatewithotherLANusers.Norouterneedstoevenbeinstalledforthistowork.C,E.TheMACaddressofthePCdoesnotneedtobeenteredmanuallyintotheswitch.TheswitchwilldynamicallylearnoftheMACaddressofthePC.D.TheSTPalgorithmdoesnotneedtohaveanyendhostinformationaddedinorderforittowork.

[多选题]属于私有IP段的是()

正确答案 ：ABD

10.0.0.0-10.255.255.255

172.16.0.0-172.31.255.255

192.168.0.0-192.168.255.255

解析：ABD

[单选题]Given that you have a class B IP address network range, which of the subnet masks below will allow for 100 subnets with 500 usable host addresses per subnet?

正确答案 ：C

255.255.254.0

解析：解析：Explanation:

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