In the LDP session establishment process, the active party will first send the lnitialization information for parameter negotiation, and if the passive party does not accept the negotiation parameters, it will send _____ .

• A.Initialization Message
• B.Keepalive Message
• C.Error Notification Message
• D.Hello Message

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From this picture, we can judge

• A.R1have2indivualIS-ISNeighbor
• B.R1ofGE0/0/0definitely haveLevel-2ability
• C.R1definitely existsLevel-2ofLSDB
• D.R1ofGE0/0/1definitely haveLevel-2ability

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About the site in the BGPIMPLS IP VPN network architecture. Which of the following descriptions is correct?

• A.site is a groupIPsystem, a network of hosts cannot be called a site
• B.through the sameCETerminals connected to the operator's network may belong to different sites(MCE)
• C.in any case, belong to the sameVPNDifferent sites on the
• D.The two geographically separated networks must belong to different sites

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As shown in the figure:

• A.This device is ABR
• B.The type of the LSA is AS-exterma1-LSA
• C.The destination network described by this LSA is 10.0.23.0/24
• D.The LSA in the figure is generated by this router

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OSFFv2 is an IGP running on an IPv4 network: OSPFV3 is an IGP running on an IPv6 network. Compared with OSPFv2, SPFV3 has a similar LSA type, but the function is slightly different. Which of the following is not included in the LSA type of OSPFv3?

• A.Router-LSA
• B.ASBR-Summary-LSA
• C.AS-External-LSA
• D.Network-LSA

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