What Cisco IOS feature examines packets received to make sure that the source address and interfaceare in the routing table and matck the interface that the packet was received on？（）

单项选择题InwhichstatecanBGPpeersexchangeUpdatemessages？（）

A.Active
B.OpenSent
C.OpenConfirm
D.Established
E.Idle

单项选择题InPIM-SMoperations，thefirstrouterconnectedtothemulticastsourcesendstheRegistermessagetowhichdevice？（）

A.Multicast source
B.Multicast receiver
C.RP
D.RP mapping agent
E.Designated Router （DR）

单项选择题TypicalADSLbroadbandInternetaccessrequiresausernameandpasswordtobeenteredonend-userPCconnectedtotheADSLmodeminorderfortheendusertogainaccesstotheInternet.ifaCiscoADSLrouterisusedinsteadofanADSLmodem，whatfunctionalityisrequiredontheCiscoADSLroutersotheend-userconnectedtotheCiscoADSLroutercanaccesstheInternetwithoutenteringausernameandpassword？（）

A.PPPoA
B.Route Bridge Encapsulation（RBE）
C.PPPoE client
D.Integrated Routing and Bridging（IRB）
E.AAA

单项选择题WhatistheroleofForwardingEquivalenceClass（FEC）inMPLS？（）

A.FEC determines how IP packets are forwarded in MPLS LSP.
B.FEC determines how to establish an LSP path.
C.FEC determines how a group of IP packets are mapped to an LSP.
D.FEC determines how MPLS labels are stacked in LSP.
E.None of above.

单项选择题TheIPv6addressFE80：：656：78FF：FE9A：BCDEiswhattypeofaddress？（）

A.Site-local
B.Link-local
C.Multicast
D.None of the above