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How TCP Powers Every Web Request: From Handshake to Data Delivery

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When a browser like Chrome connects to a website, it first performs a TCP three-way handshake — exchanging SYN, SYN-ACK, and ACK signals — before any real data is transmitted. Once the connection is established, the browser sends an HTTP request, and the server responds with the requested content such as HTML or video data. Every packet of application data is acknowledged by the receiver to ensure reliable delivery across the network. Modern TCP improves performance through a sliding window mechanism, allowing multiple packets to be sent before waiting for acknowledgments. Advanced features like flow control, congestion control, and sequence numbers further ensure speed and reliability in data transmission.

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How TCP Powers Every Web Request: From Handshake to Data Delivery · ShortSingh