[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]TELNET工作在OSI哪一层()
正确答案 :D
应用层
[单选题]PPP工作在OSI的哪一层()
正确答案 :B
数据链路层
[单选题]两个VLAN之间要想通信,应该使用的设备是()
正确答案 :C
路由器
[单选题]路由器“路由模式”的提示符号是()
正确答案 :D
(config-router)
[单选题]路由器当前的模式为“端口模式”,要退回到“特权模式”,应该使用的快捷键为()
正确答案 :B
ctrl+z
[单选题]The 201.145.32.0 network is subnetted using a /26 mask. How many networks and IP hosts per network exists using this subnet mask?
正确答案 :C
4 networks and 62 hosts
解析:解析:Explanation:
[单选题]Which one of the following characteristics is true regarding the use of hubs and switches?
正确答案 :E
Switches increase the number of collision domains in the network.
解析:解析:Explanation:Switchesincreasesthenumberofcollisionsdomainsinthenetwork.SwitchesthatareconfiguredwithVLANswillreducethesizeofthecollisiondomainsbyincreasingthenumberofcollisiondomainsinanetwork,butmakingthemsmallerthanthatofonebig,flatnetwork.IncorrectAnswers:A.SwitchesarecapableofVLANconfigurations,buthubsarenot.B.Hubsaregenerallytheleastcostlymethodpossibletoconnectmultipledevicestogetherinanetwork.C.Switchesforwardbroadcastsandmulticasts,bydefault,toallportswithinthesameVLAN.Onlyroutersblockallbroadcasttrafficbydefault.D.Switchesandhubscanbeequallyefficientinprocessingframes,intheory.Inpractice,switchesaregenerallymoreefficientastheyusuallyhavemoreCPUandmemoryallocatedtothem,andaregenerallymuchmoreexpensivethanasimplehub.
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