利用E-R模型进行数据库的概念设计，可以分成3步：首先设计局部E-R模型，然后把各个局部E-R模型综合

A.Itrequiresanext-nexthopbackuptunnel.

B.Pointoflocalrepair（PLR）swapsthenexthoplabelandpushesthebackuplabel.

C.Thebackuptunnelterminatesonthemergepoint（MP）wheretrafficrejoinstheprimarytunnel.

D.Thebackuptunnelcanhaveassociatedbandwidthcapacity.

E.Restorationtimeisexpectedunder50ms.

A.head-endrouter

B.branch-pointrouter

C.midpointrouter

D.leaf-pointrouter

E.tail-endrouter

A.network-basedapplicationrecognition（NBAR）

B.authenticationproxy

C.statefulpacketfiltering

D.AAAservices

E.proxyserver

F.IPS

A. It provides dynamic neighbor discovery

B. It detects unreachable neighbors in 90 second intervals

C. It maintains neighbor relationships

D. It negotiates correctness parameters between neighboring interfaces

E. It uses timers to elect the router witch the fastest links as the designated router

F. It broadcasts hello packets throughout the internetwork to discover all routers that are running OSPF

A.TheIPinspectionrulecanbeappliedintheinbounddirectiononthesecuredinterface.

B.TheIPinspectionrulecanbeappliedintheoutbounddirectionontheunsecuredinterface.

C.TheACLappliedintheoutbounddirectionontheunsecuredinterfaceshouldbeanextendedACL.

D.TheACLappliedintheinbounddirectionontheunsecuredinterfaceshouldbeanextendedACL.

E.FortemporaryopeningstobecreateddynamicallybyCiscoIOSFirewall，theaccess-listforthereturningtrafficmustbeastandardACL.

F.FortemporaryopeningstobecreateddynamicallybyCiscoIOSFirewall，theIPinspectionrulemustbeappliedtothesecuredinterface.

on networks 192.168.146.0,192.168.147.0,192.168.148.0and192.168.149.0 only.Which two ACL statements when combined are the best for accomplishing the task?（）

A. access-list 10 permit ip 192.168.147.0 0.0.0.255.255

B. access-list 10 permit ip 192.168.149.0 0.0.0.255.255

C. access-list 10 permit ip 192.168.146.0 0.0.0.0.255

D. access-list 10 permit ip 192.168.146.0 0.0.0.1.255

E. access-list 10 permit ip 192.168.148.0 0.0.0.1.255

F. access-list 10 permit ip 192.168.146.0 255.255.255.0

A.Clustersareusedinconfederationschemestoavoidloops.

B.BGPnetworkcanhaveaconfederationwithinaroutereflectorarea.

C.AninternalBGPnetworkcannothavearoutereflectorwithinaconfederation.

D.AninternalBGPnetworkcanhavearoutereflectorwithinaconfederation.

E.Clustersareusedinroutereflectorschemestoavoidloops.

F.BGPnetworkcannothaveaconfederationwithinaroutereflectorarea.

A.AllIPpacketspassingthroughtherouter

B.OnlyIPpacketswiththesourceaddressof10.1.1.1

C.AllIPpacketsfrom10.1.1.1to172.16.1.1

D.AllIPpacketsbetween10.1.1.1to172.16.1.1

A.Itsupportsfastsynchronizationatstartingandbeforenetworkfailures

B.Itsupportsautomaticserverdiscovery

C.Itusesafixed-pointarithmetion

D.Itsupportsthe"nanokernel"kernelimplementation

E.ItdoesnotsupportPublic-KeyCryptography