The hello time of the BGP neighbor PeerA in the Open is 90s, and the Hold time of the PeerB in the Open is 30s. The interval for sending the keepalive message after the PeerA and PeerB are successfully connected is:

• A.10s
• B.90s
• C.30s
• D.Do not send Keepalive messages

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Which version of IGM is required in SSM?

• A.IGMPv1
• B.IGMPv2
• C.IGMPv3
• D.IGMPv4

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Which of the following tools cannot be directly referenced by the route-policy apply clause?

• A.origin
• B.community
• C.IP-Prefix
• D.tag

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The following statement about OSPF neighbor information:

• A.The router ID of this router is 1.1.1.1
• B.The neighbor's router ID is 2.2.2.2
• C.This router is Master
• D.The address of DR is 10.1.1.1

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IGMP Snooping mainly solves () problems.

• A.The receiver host only supports the IGMPv2 protocol, but the SSM multicast model is used in the network.
• B.The legality of IGMP Report messages.
• C.There are a large number of receiver hosts on the network segment. The router will receive a large number of IGMP Report messages.
• D.Solve the broadcast problem of multicast data packets on Layer 2 devices. It is used to manage and control the forwarding of multicast data packets.

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