The following statement about the alliance is correct? (Single choice questions).

• A.The consortium divides an AS into sub-AS, and the alliance external AS still considers the consortium to be an AS
• B.Subsystems within a consortium can use private AS numbers. Huawei NE/AR routers, a consortium can be configured with up to 32 subsystems
• C.The subas number of the consortium, which by default notifies BGP peers outside the consortium
• D.Consortium can easily detect the routing loop within the AS because EBGP is running between the subAS.

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As shown in the following figure, a part of the LSDB LSDB of a router LSDB is shown in the first one in the following figure. A new LSP has been received, the second one in the figure below, and the following statement is incorrect (single choice).

• A.This router ignores LSPs received from neighbors
• B.In the case of a broadcast network, DIS will include summary information for this LSP in the next CSNP message.
• C.If it is a point-to-point network, the router will send PSNP
• D.this router will put the newly received LSP into the LSDB

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There is an existing network of router RI, router R, router R3, and router R4. The 4 routers are interconnected via an LN network. All 4 routers are equipped with basic oSPF. When you execute the command "displayosp" on router R2 f peer", router R2 and router R3 are discovered. The status between is "2-way".
So what conclusions can you draw from this output? (Multiple choice questions).

• A.Router R2 is DR or BDR
• B.Router R4 is destined for DR
• C.Router R3 is not a DR, nor is it a BDR
• D.Router R2 is not a DR
• E.There is no full adjacency between router R2 and router R3

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In an MPLS VPN network, different CE devices exchange routing information with the same PE device using different routing protocols, and different CE devices use routing protocols that are independent of each other

• A.True
• B.False

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MACsec provides users with secure MAC layer data sending and receiving services.
Which of the following is not a service available by ACsec?

• A.User data encryption
• B.Data source authenticity verification
• C.Integrity check
• D.Controllability check

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