SDP

VoIP and WebRTC: Real‑Time Communication Demystified VoIP stands for Voice over Internet Protocol. WebRTC is a newer set of browser technologies that lets you share audio, video, and data in real time without plugins. Both aim to connect people, but they work in different environments. VoIP is common in phones and servers. WebRTC shines when you want a quick, browser-based chat or conference. How it works at a glance Signaling to start a call: participants exchange messages to agree on how to talk, which codecs to use, and what network path to take. Media path: once the call starts, audio and video flow as real‑time media using code like RTP, usually over UDP for low delay. Traversing networks: devices sit behind firewalls and NAT. Tools like ICE help find a way through, often using STUN to learn the public path and TURN to relay when direct paths fail. Security: WebRTC encrypts media and signaling by design, helping keep conversations private. Key components you may encounter ...