[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]OSPF骨干区的区域编号为（）

正确答案 ：C

0.0.0.0

[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]在OSI七层模型中，介质工作在哪一层()

正确答案 ：C

物理层

[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]为了阻止交换机环路，交换机上所采用的技术为（）

正确答案 ：B

生成树协议

[单选题]After logging into a router and typing in a few show commands, you press the up arrow key. What will this do?

正确答案 ：A

It will recall the previous command line

解析：解析：Explanation:

[单选题]对于使用链路状态路由协议的路由器如何选择最佳路线到达子网，下列哪项是正确的（）

正确答案 ：B

通过针对链路状态数据库中的信息运行SPF算法，路由器会计算出最佳路由

[单选题]IP地址为：192.168.50.70，掩码为：255.255.255.248，则该IP和掩码结合，共划分了多少个子网（不包括全0子网和全1子网）（）

正确答案 ：B

30

[单选题]默认情况下，RIP定期发送路由更新的时间是（）

正确答案 ：B

30S

查看原题 点击获取本科目所有试题