ICE Candidates and Connectivity

ICE stands for Interactive Connectivity Establishment. It's a crucial framework in WebRTC that helps establish direct connections between peers, even when they are behind tricky networks like NATs or firewalls.

Think of ICE as a smart detective. It finds all possible routes for two people to talk directly and then picks the best one.

Many devices connect to the internet through routers that use NAT (Network Address Translation) or have firewalls. These act like security guards, often blocking direct incoming connections.

• NAT: Hides private network IPs behind a single public IP.
• Firewalls: Block unauthorized access.

Without ICE, establishing a direct peer-to-peer connection in such environments would be nearly impossible.