juniorWebSockets
What is WebSocket and how is it different from HTTP?
Updated May 6, 2026
Short answer
WebSocket is a full-duplex communication protocol over a single persistent TCP connection, unlike HTTP which is request-response based.
Deep explanation
WebSockets allow continuous two-way communication between client and server after an initial HTTP handshake. Unlike HTTP, which requires a new request for every response, WebSockets maintain an open connection enabling real-time data exchange with low latency.
Real-world example
Used in chat applications, live sports updates, and stock trading dashboards.
Common mistakes
- Thinking WebSockets replace HTTP completely instead of complementing it.
Follow-up questions
- When should you use WebSockets instead of HTTP?
- Is WebSocket stateless like HTTP?