[单选题]NAT可以被用于完成多种功能，以下不属于其功能的是：（）

正确答案 ：D

内部网络流量控制

[单选题]A new Ezonexam switch is installed into an existing LAN and a new VTP trunk is set up with an existing switch. Which VLANs will be allowed on this new trunk?

正确答案 ：A

All defined VLANs are allowed on the trunk by default.

解析：解析：Explanation:

[单选题]OSI七层模型中，传输层的数据封装名称为（）

正确答案 ：D

段

[单选题]A receiving host has failed to receive all of the segments that it should acknowledge.What can the host do to improve the reliability of this communication session?

正确答案 ：E

Decrease the window size

解析：解析：Explanation:

[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

[单选题]路由器下，由一般用户模式进入特权用户模式的命令是：（）

正确答案 ：A

enable

[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.

[单选题]The Ezonexam network administrator has just issued the "switchport trunk native vlan 998" command on switch VE2. What is the function of this command?

正确答案 ：B

It designates VLAN 998 for untagged traffic

[多选题]Why is full-duplex Ethernet superior to its single-duplex counterpart? (Select two answer choices.)

正确答案 ：BD

It operates without collisions

It provides faster data transfer

解析：解析：Explanation:

[单选题]为了查看路由器的E0端口上，是否挂接了访问权限表，应该使用的命令是（）

正确答案 ：B

show interface e0

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