Regarding the special area of OSPF, which of the following description of is incorrect?

• A.The difference between a Totally Stub area and an NSSA area is that the Totally Stub area does not accept inter-area routing information.
• B.The NSSA Area is different from the Stub area because this area allows the import of autonomous system external routes, and the ABR advertises LSA7 notifications to this area.
• C.The Totally Stub Area allows the ABR to advertise the default Type 3 LSA, but does not accept the Type 5 LSA and the refined Type 3 LSA
• D.The difference between the Stub area and the Totally stub area is that the stub area allows detailed routing information between areas

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If IGP routing wants to become a BGP routing, it can only be done through the network command.

• A.True
• B.False

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Which of the following description of the VRRP master device is wrong?

• A.Forward IP packets whose destination MAC address is a virtual MAC address
• B.Respond to the ARP request for the virtual IP address with the virtual MAC address
• C.Periodically send VRRP packets
• D.Even if the router is already the Master, it will be preempted by the priority Backup router

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By default, the interval for sending PIM Hello packets on the router interface is () seconds.

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When the virtual router responds to the ARP request, it uses the real MAC address of the main router.

• A.True
• B.False

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