The RTCIceCandidateStats dictionary's relayProtocol property specifies the protocol being used by a local ICE candidate to communicate with the TURN server.

The ICE protocol being used by the candidate otherwise can be obtained from the protocol property.

A string identifying the protocol being used by the endpoint to communicate with the TURN server. The possible values are:

tcp

TCP (Transport Control Protocol) is being used to communicate with the TURN server.

tls

TLS (Transport Layer Security) is being used to communicate with the TURN server.

udp

UDP (User Datagram Protocol) is being used to communicate with the TURN server.