Regarding the LDP protocol session establishment process, the description is correct?

• A.When both parties receive a keepalive message from the peer, the LDP session is successfully established
• B.The party with the larger transmission address initiates the establishment of a TCP connection as the active party
• C.After the TCP connection is successfully established, the active party sends an initialization message to negotiate the relevant parameters of the LDP session,
• D.Hello messages discovered by LDP neighbors use TCP messages with a destination address of multicast address 224002

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The main routing policy tools that BGP can use are Filter-policy and Route-policy, where Fate-policy can only filter routes and Route-policy can only modify routes

• A.FALSE
• B.TRUE

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There is an As-path-filter.ip as-path-filter 1 permit*(100l400) $, which As-path-filter can match which of the following AS_PATH Attribute? (Confirmed).

• A.300 4200
• B.3100
• C.1234 1400
• D.100

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Users hope to be able to make the router forward and select messages according to their own defined policies on the basis of traditional route forwarding, and can adopt policy routing, and the following description of policy routing is incorrect

• A.Policy-based routing can be used to match message lengths
• B.Policy Routing can set the next hop IP address
• C.Policy Routing cannot be set in the next statement DSCP
• D.Policy Routing cannot be used to set IP precedence

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If the topology of the entire network does not change, but the allocation of IP segments in the router changes, ISIS only uses PRC to calculate the changed routing information, and does not recalculate all SPT

• A.True
• B.False

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