Hop Limit field in the IPv6 basic header is similar to which field in the IPv4 header?

• A.Time to Live
• B.Flags
• C.identification
• D.Protocol

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Which of the following about the description of VRRP fast switching is wrong? (Multiple Choice)

• A.A VRRP backup group cannot monitor Peer BFD, Link BFD and Normal BFD at the same time
• B.Use VRRP to monitor the BFD session or EFM function, after the BPD session or EFM session status changes, the VRRP module will be notified to realize VRRP fast connection switching
• C.When multiple BFDs are configured to monitor at the same time, each configuration is related to each other, which may have an impact
• D.Then the various configurations are related to each other, and may affect the VRRP backup group to monitor ordinary BFD, when the BFD status changes, the backup group priority will be changed to change the active and standby status

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Which of the following statements about the concept of multicast is wrong?

• A.Multicast router: router or layer three switch that supports the three-layer multicast function
• B.Multicast group: a set identified by an IP multicast address
• C.Multicast group members: Multicast group members can be widely distributed anywhere in the network
• D.Multicast source: the sender of information, who needs to join the multicast group to provide the forwarding of multicast group messages

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IGMP SSM Mapping statically binds the multicast source to the multicast group, so that group members of IGMPv1 and CGIPv2 can also access the SSM multicast network. Which of the following statements about ICIP SSM Mapping is wrong?

• A.Statically configure the SSM address mapping rules on the IGMP querier, and map the group join information in the IGMPv1 or IGMPv2 membership report to the group leave information
• B.ICMP SSM Mapping does not process IGMPv3 report messages. In order to ensure that hosts running any version of IGMP on the same network segment can get SSM services, it is necessary to run IGMPv3 on the multicast router interface connected to the network segment where the member host is located
• C.If IGMP SSM Mapping is not enabled, neither IGMPv1 nor IGMPv2 support the deployment of SSM multicast
• D.The address of the SSM multicast group is 232.0.0.0-232. 255.255.255

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Between two directly connected devices that have established IBBP neighbors, execute the shutdown command to shut down the interface of one of the devices, and the BGP connection will not be disconnected immediately.

• A.False
• B.True

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