Regarding the cross-domain VPN-OptionB scenario, what is the following description incorrect?

• A.In the process of packet forwarding, the private network LSP of the VPN should be exchanged once on the two ASBRs An EBGP neighbor relationship.
• B.Cross-domain VPN An Option
• C.scheme is not limited by the number of interconnection links between ASBRs
• D.The outer layer label is exchanged between two ASBRs to VPNv4 routes.

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In order to study the working mechanism of the OSPFv3 protocol, a project to build a network topology is as follows, the configuration of R1 and R2 is as follows, please ask the LSA switched between R1 and R2 What are the types?

• A.Inter-area-prefix-LSA
• B.Router-LSA
• C.Link-LSA
• D.network-LSA

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Is the following description of ospf virtual links correct?

• A.The virtual connection ip is used as the link address
• B.The cost of a virtual connection is zero and is the optimal link
• C.Virtual links can be used to solve the problem of zone 0 being segmented
• D.A virtual connection can be established in any area, after which it itself belongs to the region

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About multi-instance CE (Multi-VPN-Instance CE, MCE). What is the error described below?

• A.The MCE vs. PE direction must have multiple physical links to achieve isolation between different VPN instances
• B.On the MCE device, you need to create their own routing tables for different VPNs and bind to the corresponding interface
• C.Users who connect to the same MCE but are not part of a VPN instance cannot access each other
• D.MCE-enabled devices can access multiple VPI instances in BGP/RPLS IPVPN applications, reducing user network equipment investment

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0SPFV2 is running on the IPV4 network IGP: OSPF3 is running in the IPV6 network, OSPF35 OSPFV2 has the same message type. Includes hello messages, DOD messages, LSR messages, LAU messages, and SAX messages about OSPP The following statement is correct?

• A.OSPFv3 uses the link-local address as the source address for sending packets, which can be forwarded outside the range of the originating link
• B.OSPFv3 sends OSPFv3 packet using the IPV6 multicast addresses FF02::5 and FF02
• C.The hello packet of OSPFv3 carries the IPV6 address prefix of the router interface
• D.OSPFv3 uses the authentication field of the packet header to complete the packet authentication

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