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technology/internet/WebSocket.md

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+---
+obj: concept
+wiki: https://en.wikipedia.org/wiki/WebSocket
+rfc: https://datatracker.ietf.org/doc/html/rfc6455
+website: https://websockets.spec.whatwg.org
+---
+
+# WebSocket
+WebSockets provide a bidirectional communication channel over a single, long-lived connection. This enables real-time, low-latency data exchange between a client and a server.
+
+## WebSocket Protocol
+### 1. **WebSocket Handshake:**
+The WebSocket handshake is an [HTTP](HTTP.md)-based protocol that establishes a connection between the client and server. Once established, the connection switches to the WebSocket protocol.
+### 2. **WebSocket Frames:**
+Messages in WebSockets are sent as frames. Frames can be text, binary, or control frames used for connection management.
+
+## Usage and Benefits
+### 1. **Real-Time Applications:**
+WebSockets are ideal for real-time applications like live chats, online gaming, financial trading, and collaborative tools.
+### 2. **Reduced Latency:**
+The persistent connection minimizes latency compared to traditional [HTTP](HTTP.md), making WebSockets suitable for applications requiring low-latency communication.
+### 3. **Efficient Data Transfer:**
+WebSockets use a compact binary frame format, reducing the overhead associated with text-based protocols.