Video > ICE Parameters

ICE lines

Next we have the ICE lines, which is the mechanism chosen for NAT traversal in WebRTC. You can find a very didactic and comprehensive explanation of ICE here. ICE is complex enough to deserve its own post, but I will try to explain its SDP lines in an understandable way.

a=ice-options:google-ice

This line indicates that we are using the ICE version implemented by Chrome which has some tiny differences from the RFC5245.