テーマ： tcp

• TCP connections: the handshake, retransmission timers and keep-alives

  A TCP connection starts with a three-way handshake, recovers lost segments by a retransmission timer that doubles on each failure, and is only checked for liveness if keep-alives are switched on per socket. Linux defaults mean a hung peer takes minutes to notice and an idle connection two hours before the first probe.

  article · en · reviewed · 知識の基準日 2026-09-15

機械可読： JSON