Understanding STUN (Session Traversal Utilities for NAT) in VoIP Architecture
This guide provides a comprehensive technical overview of Session Traversal Utilities for NAT (STUN) and its role in real-time IP communications. Readers will learn how STUN enables endpoints behind Network Address Translation (NAT) to discover their public IP address and port mappings. The article details STUN packet exchange mechanisms, NAT classification handling, integration into SIP/SDP workflows, and its structural place within ICE frameworks.