As shown in the figure, Router ABR1 (Router ID: 100.0.0.22) imports a RIP route 10.0.0.0/24. Viewing the LSDB of router RT1 has the ASE LSA with an LS ID of 10.0.0.0 generated by ASBR1, but the routing table of RT1 does not have a corresponding route.

The possible causes are: (Multiple choices)

• A.Router ABR2 does not generate ASBR SUMMARY LSA with LS ID 100.0.0.22 to Area 0.
• B.Router ASBR1 does not generate ASBR SUMMARY LSA with LS ID 100.0.0.22 to Area 2.
• C.Router RT1 does not have an OSPF Inter-area route to the forwarding address 100.1.1.9.
• D.Router ABR1 does not generate ASBR SUMMARY LSA with LS ID 100.0.0.22 to Area 0.
• E.Router RT1 does not have an OSPF external (ASE) route to the forwarding address 100.1.1.9.
• F.Router ABR3 does not generate ASBR SUMMARY LSA with LS ID 100.0.0.22 to Area 1.

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The following is the output information of the router RTA. Which of the following description of the output information is correctangle?
[RTA]multicast routing enable
[RTA]pim
[RTA-pim]static-rp 172.16.1.1
[RTA]interface Ethernet0/1
[RIA-Etheernet0/1]pim sm

• A.PIM-DIM mode runs on the router
• B.The router runs multicast, you do not need to enable multicast routing-enable
• C.Statically specified RP is 172.16.1.1
• D.Router RTA interface Ethernet0/1 runs PIM-DM

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The above information about the output of the display ospf peer, which is correct?

• A.Router ID indicates that the local router ID is 10.1.1.1.
• B.The designated router (DR) address is 10.1.1.1.
• C.Address: 10.1.1.1 indicates that the local interface address is 10.1.1.1.
• D.During the DD exchange process, the local end becomes the Slave.

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Which of the following is incorrect about the OSPF protocol?

• A.Virtual connection is a virtual link that belongs to the backbone area (Area 0).
• B.When a router receives a Network-Summary-LSA, the router runs the SPF algorithm.
• C.Network-LSA is used to describe the link status information of the broadcast network segment and the NBMA network segment.
• D.Type-4 LSA is used to describe how to reach the ASBR and contain routing and topology information.

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Which of the following description about the features of the prefix list is wrong?

• A.The prefix list has a stronger matching function for the route prefix than the access control list.
• B.Prefix list can be used for packet filtering.
• C.The prefix list can be used to filter the IP prefix.
• D.The prefix list can match the prefix number and prefix length.

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