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Essential Network Protocols Explained: HTTP, HTTPS, HTTP/3, WebSocket, TCP, UDP

Content Introduction

This comprehensive overview explains the key network protocols that power the internet, covering HTTP request-response model, HTTPS encryption with TLS, HTTP/3 performance improvements with QUIC, WebSocket real-time communication, and the fundamental differences between TCP and UDP transport protocols.

Key Information

  • 1HTTP uses request-response model with methods like GET, POST, PUT, DELETE
  • 2HTTPS adds TLS encryption for security and authentication
  • 3HTTP/3 uses QUIC over UDP to eliminate head-of-line blocking and reduce latency
  • 4WebSocket enables full-duplex real-time communication over single TCP connection
  • 5TCP provides reliable, ordered data delivery with congestion control
  • 6UDP focuses on speed with minimal overhead for real-time applications

Content Keywords

#HTTP Request-Response

Client-server model where clients make requests and servers return responses with status codes

#HTTPS TLS Encryption

Encrypted HTTP using Transport Layer Security to protect data in transit and verify server identity

#HTTP/3 QUIC Protocol

Latest HTTP version using QUIC over UDP for faster connections and better performance

#WebSocket Real-time

Full-duplex bidirectional communication protocol for instant data exchange

#TCP Reliability

Connection-oriented protocol ensuring reliable, ordered data delivery with error checking

#UDP Speed

Connectionless protocol prioritizing low latency over reliability for real-time applications

Related Questions and Answers

Q1.What are the main differences between HTTP and WebSocket?

A: HTTP uses request-response model while WebSocket provides full-duplex bidirectional communication on a single persistent connection for real-time data

Q2.How does HTTPS provide security over HTTP?

A: HTTPS uses TLS encryption to establish secure connections, verify server identity, and prevent man-in-the-middle attacks

Q3.What performance advantages does HTTP/3 offer over previous versions?

A: HTTP/3 uses QUIC over UDP to eliminate head-of-line blocking, enable 0-RTT connection resumption, and provide better network switching support

Q4.When should you choose TCP vs UDP?

A: Use TCP for reliability-critical applications like web browsing and file transfer; use UDP for real-time applications like gaming and streaming where speed matters most

Q5.What problem does QUIC solve in HTTP/3?

A: QUIC eliminates TCP's head-of-line blocking, combines cryptographic and transport handshakes, and provides built-in encryption at the transport layer

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