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Medium Pro#network

Quá trình TCP 4-way handshake hoạt động thế nào và trạng thái TIME_WAIT có vai trò gì?

February 15, 2026

Quick summary

The TCP 4-way handshake terminates a full-duplex connection independently in both directions using FIN/ACK packets to prevent data loss. The `TIME_WAIT` state (lasting 2 MSL) ensures the final ACK is delivered and prevents delayed packets from interfering with new connections.

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