As shown below, RI, R2 establish EBGP neighbors, and once turned on, the BFD detection function, the following statement is correct?

• A.RI Detection time for BFD messages for 1280ms
• B.RDetection time for BFD packets for 2 Detection time for BFD messages 800m5
• C.RI. The detection time for bFD messages for 660ms
• D.R2 is 600ms

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Traditional BGP-4 can only manage IP4 unicast routing information, and MP-BGP extends BGP-4 to provide support for multiple network layer protocols. Among them, MP-BGP's support feature for IPv6 unicast networks is called BGP4+, BGP4+ via NextHop. The route next hop address information is carried by the attribute.

• A.FALSE
• B.TRUE

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The correct statement about the IGMP proxy is? Multi-select

• A.The downstream interface of the IGMP proxy device generates multicast relay table items
• B.IGMP proxy is typically deployed on devices between hosts that are members of the access device The
• C.IGMP proxy can detect the link status with the linkage through the information of the member host joining/leaving the multicast group, and realize the rapid switching of the primary and standby device links
• D.IGMP proxy device cannot send query messages to downstream member hosts in place of the IGMP queryer to maintain group membership

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If the topology of the entire network does not change, but the allocation of IP segments in the router changes, ISIS only uses PRC to calculate the changed routing information, and does not recalculate all SPT

• A.False
• B.True

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/R1Jospf1lRL-osp- jarea.2[RLospf-1-arca-0002]network1001310000 As shown in the configuration, the administrator configured OSPF but RI on R1 You cannot learn routes for other routing rings. Then the possible cause is the question).

• A.This router is configured with a different zone ID than its neighbor router's zone ID
• B.This router does not have an OSPF process number configured
• C.This router does not have authentication features configured, but neighbor routers configure authentication features
• D.The declared network address of this router does not match the interface mask

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