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單項選擇題

Refer to the exhibit. Look at the command output. What can you use to prevent this behavior？（）

A. UDLD （UniDirectional Link Detection）
B. spanning-tree loopguard
C. VTP mode transparent
D. switchport mode desirable

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單項選擇題

Which IGMPv2 message contains a non-zero "Max Response Time"？（）

A.Membership Query
B.Membership Report
C.Membership Delay
D.Backward Compatible IGMPv1 Report Message

單項選擇題

Apart from interdomain multicast routing， what else is MSDP used for？（）

A.Source Specific Multicast and IGMPv2
B.Announcing multicast sources to BGP speakers
C.Anycast RP
D.Intradomain multicast routing

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