You would like two LDP routers on opposite sides of your network to become neighbors. Which LDP message is used to form this relationship?
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A. B. C. D.B
The correct answer is C. peer discovery.
In LDP (Label Distribution Protocol), the process of forming a neighbor relationship between two routers is called discovery. During the discovery process, routers exchange information about their LDP capabilities and agree on the label distribution mode to use.
There are several types of LDP discovery messages, including basic discovery, extended discovery, peer discovery, and remote discovery. Each of these messages serves a specific purpose in the discovery process.
Basic discovery is used by an LDP router to discover other LDP routers on its directly connected networks. This message contains basic information about the LDP router's capabilities, such as its LDP identifier and transport address.
Extended discovery is used to exchange more detailed information about the LDP router's capabilities, including its supported label distribution modes, MPLS forwarding capabilities, and label retention modes.
Remote discovery is used by an LDP router to discover other LDP routers that are not directly connected but can be reached through an IGP (Interior Gateway Protocol) or LDP tunnel.
Peer discovery is the message used to form a neighbor relationship between two LDP routers on opposite sides of a network. During peer discovery, two routers exchange information about their LDP capabilities and agree to become neighbors. This message contains information such as the LDP router ID, transport address, and label distribution mode.
In summary, the correct answer is C. peer discovery, which is used to form a neighbor relationship between two LDP routers on opposite sides of a network.