[单选题]下列路由协议中，属于链路状态路由协议的是（）

正确答案 ：D

OSPF

[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.

[单选题]Which type of cable should be used to make a connection between the Fa0/0 port on a router and the Fa0/0 port switch?

正确答案 ：D

Straight-through cable

解析：解析：Explanation:Straight-throughcablesareusedtoconnecthosttoswitch(orhub)androutertoswitch(orhub).

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