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What is a characteristic of prefix segment identifier?
Correct Answer: D
A prefix segment identifier (PSID) is a unique identifier used in Segment Routing (SR) networks. It is locally significant within a specific SR domain. Each PSID corresponds to a specific segment (such as a node or an adjacency) in the SR domain. PSIDs are used to create segment lists that define the path a packet should follow through the network. Unlike globally unique identifiers, PSIDs are only meaningful within the context of a single SR domain.