正确答案: B

每台路由器的LSDB(链路状态数据库)都是相同的

题目：OSPF在同一区域内，下列说法正确的是（）

解析：B

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举一反三的答案和解析：

[单选题]两台路由器直连到一起，应该使用的线缆为（）

交叉线缆

[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)

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.

[单选题]An administrator issues the show ip interface s0/0 command and the output displays that interface Serial0/0 is up, line protocol is up.What does "line protocol is up" specifically indicate about the interface?

Keepalives are being received on the interface.

解析：解析：Explanation:

[单选题]备份路由器IOS的命令是：()

copy flash tftp

[单选题]路由表中，某条路由的“路由代码为D”，则表明该路由为（）

EIGRP路由

[多选题]交换机的三大功能为（）

地址学习

转发过滤

消除回路

解析：ABC

[单选题]当在一个接口上使用ipaccess-group99in命令时，以下哪条关于所引用访问控制列表的描述是正确的（）

这个列表是编号型标准ACL，检查进入接口的数据包

[多选题]属于私有IP段的是()

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