Transmission Control Protocol - Wikipedia⋮ ⋮ 56 448 Source port (16 bits) Identifies the sending port.[17] Destination port (16 bits) Identifies the receiving port.[17] Sequence number (32 bits) Has a dual role: If the SYN flag is set (1), then this is the initial sequence number. The sequence number of the actual first data byte and the acknowledged number in the corresponding ACK are then this sequence number plus 1. If the SYN flag is
TCPコネクション〜3wayハンドシェイクとTCP FIN〜 | SEの道標
TCP|ソケット接続|信頼性の高い通信|プロセス間通信|3ウエイハンドシェーク
