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單項選擇題

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？（）

A.MPLS Traffic Engineering
B.Dynamic access-lists
C.Authentication
D.Receive ACL
E.Unicast RPF

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單項選擇題

In which state can BGP peers exchange Update messages？（）

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

單項選擇題

In PIM-SM operations， the first router connected to the multicast source sends the Register message towhich device？（）

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

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