Understanding WebRTC: The Complete Architecture Guide

By Yash Patel · Published February 25, 2026 · 1 min read · Source: Level Up Coding

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Real-Time Communication in Modern Flutter Apps

Understanding WebRTC: The Complete Architecture Guide

Yash Patel13 min read·Feb 14, 2026

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Real-time communication is everywhere now. Video calls, voice chats, instant messaging — they all happen instantaneously. But have you ever wondered how this works? How does your voice reach someone on the other side of the world in milliseconds? The answer lies in WebRTC, a revolutionary technology that powers peer-to-peer communication.

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In this article, I’ll break down everything you need to know about WebRTC architecture, from the fundamental concepts to how it all fits together. By the end, you’ll understand the complete picture of how real-time communication works.

1. What is WebRTC?

2. The Communication Channel

3. Peer Connection Lifecycle

4. Understanding SDP (Session Description Protocol)

5. ICE Candidates: Bridging the Network Gap

6. STUN & TURN Servers

7. Complete Architecture Overview

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