Regarding the Stub area and the NSSA area of the OSPF protocol, which of the following statement is wrong?

• A.Stub area and NSSA area are not allowed to inject Type 4 LSA.
• B.Both the Stub area and the NSSA area are allowed to inject Type 3 LSA.
• C.Type 5 LSA is not allowed to be injected in the Stub area, and Type 5 LSA is allowed to inject in the NSSA area.
• D.The Type 7 LSA is not allowed to be injected in the Stub area, and the NSSA area is allowed to inject the Type 7 LSA.

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If the host HW1 in the HW device network wants to join a video conference, what does the host do?

• A.Send a unicast IGMPv2 membership report to the RP
• B.Send the IGMPv2 membership report through multicast on the local network. The destination multicast address sent by the IGMPv2 membership report is "all PIM routers" 224.0.0.2 multicast address.
• C.Send IGMPv2 membership report unicast to the default router on the local network.
• D.Sending an IGMPv2 membership report through multicast on the local network, and the multicast address carried in the IGMPv2 membership report is the joined multicast address.

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Network administrators can use CAR technology in traffic policing. Which of the following technologies can be applied in CAR?

• A.Single barrel single speed
• B.Double barrel double speed
• C.Double barrel single speed
• D.Three barrels single speed

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

• A.False
• B.True

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Which of the following attributes cannot be directly referenced by the if-match of a routing policy?

• A.Regular expressions
• B.As-Path-filter
• C.IP-prefix
• D.Community-filter

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