[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?
正确答案 :C
Keepalives are being received on the interface.
解析:解析:Explanation:
[单选题]地址转换NAT的优点是()
正确答案 :B
地址转换可以缓解地地址短缺的问题
[单选题]在OSPF的完全存根区域中,使用以下哪种LSAType报文或其它方式与区域间通信:()
正确答案 :D
默认路由:0.0.0.0
[多选题]网络中经常使用DDN服务,请选出DDN的优点()
正确答案 :ADE
传输质量高
使用虚电路
专用线路
解析:ADE
[多选题]You need to configure a default route on a Ezonexam router. Which command will configure a default route on a router?
正确答案 :ABCD
VE1(config) ip route 0.0.0.0 10.1.1.0 10.1.1.1
VE1(config) ip default-route 10.1.1.0
VE1(config) ip default-gateway 10.1.1.0
VE1(config) ip route 0.0.0.0 0.0.0.0 10.1.1.1
解析:解析:Explanation:Thecommand"IProute0.0.0.00.0.0.0quot;$commandisusedtoconfigureadefaultrouteonarouter.Inthiscase,adefaultroutewithanexthopIPaddressof10.1.1.1wasconfigured.IncorrectAnswers:A.Thiswillbeaninvalidroute,sincethe"10.1.1.0"valuewillspecifythenetworkmask,whichinthiscaseisinvalid.B,C.Thesecommandsareinvalid.Thecommand"ipdefault-network"couldbeused,butnot"ipdefault-route"or"ipdefault-gateway".IPdefault-gatewayisusedonswitches,notrouters.
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