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Answer Routing Information used for routing Hop-by-Hop Id is used instead of Destination-Host or Destination-Realm AVP Hop-by-Hop Id is unique within each hop Answer routing path is the reverse of the request path Routing Rules: For answer originators: Use the same Hop-by-Hop Id found in the request For answer forwarders: Lookup Hop-by-Hop Id in request queue If found, forward answer to appropriate peer and remove request from the queue Otherwise, discard |