[单选题]通配符掩码和子网掩码之间的关系是（）。

正确答案 ：A

两者没有什么区别

[单选题]为了使配置私有IP的设备能够访问互联网，应采用的技术是()

正确答案 ：A

NAT

[单选题]对路由器的描述，正确的是（）

正确答案 ：C

多广播域，单冲突域的设备

[单选题]下列对RIP的配置中，合法的命令是（）

正确答案 ：C

router rip network 10.12.0.0

[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

[多选题]交换机的三大功能为（）

正确答案 ：ABC

地址学习

转发过滤

消除回路

解析：ABC

[单选题]The Ezonexam corporate LAN consists of one large flat network. You decide to segment this LAN into two separate networks with a router. What will be the affect of this change?

正确答案 ：D

It will prevent segment 1's broadcasts from getting to segment 2.

解析：解析：Explanation

[多选题]The Ezonexam network administrator needs to determine what LAN devices to install on the Ezonexam network. What are two advantages of using Layer 2 Ethernet switches over hubs? (Choose two)

正确答案 ：AD

Allowing simultaneous frame. transmissions

Filtering frames based on MAC addresses

解析：解析：Explanation:A:Ahalfduplexconnectioniswhereonlyonedevicecansendorreceiveatatime.Afullduplexconnectioniswherebothdevicescansendandreceiveatthesametime.Thus,ifyouhavea100Mbhalf-duplexconnection,onlysendingat100MbORreceivingat100Mbcanhappenatthesametime.Ifyouhavea100Mbfullduplexconnection,youcaneffectivelyget200Mboutofthelinkbecauseyoucouldbesending100Mbandreceiving100Mbatthesametime.D:SwitchesarecapableoffilteringframesbasedonanyLayer2fields.Forexample,aswitchcanbeprogrammedtoreject(notforward)allframessourcedfromaparticularnetwork.Becauselinklayerinformationoftenincludesareferencetoanupper-layerprotocol,switchesusuallycanfilteronthisparameter.Furthermore,filterscanbehelpfulindealingwithunnecessarybroadcastandmulticastpackets.

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