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Hop-by-Hop vs. Full-Path Hop-by-hop: individual control loops between SIP entities. Simple and can effectively prevent overload. Full-path: a single control loop for each source-destination pair. May increase efficiency compared to hop-by-hop overload control. Very complex! Requires endpoints to track load on all possible paths to a target. A B C D A B C D hop-by-hop full-path |