Conference Call Web Conference Protocols 2

Question 1

Which transport protocol does WebRTC primarily use for low-latency audio and video media streams?

Accepted Answer

UDP

Answer

WebRTC favors UDP because its lower latency tolerates occasional packet loss better than TCP retransmissions.

Question 2

What is the main purpose of a STUN server in a web conferencing session?

Accepted Answer

Discover a device's public IP and port behind NAT

Answer

STUN lets a client learn its public-facing address so peers can attempt a direct connection through NAT.

Question 3

When a direct peer-to-peer path fails, which server type relays the media traffic?

Accepted Answer

TURN server

Answer

A TURN server relays media when NAT or firewall rules block a direct peer connection.

Question 4

Which framework does WebRTC use to negotiate the best connection path between peers?

Accepted Answer

ICE

Answer

ICE gathers and tests candidate address pairs to select the optimal connectivity path.

Question 5

What protocol secures the media payload in a WebRTC session?

Accepted Answer

SRTP

Answer

SRTP encrypts and authenticates the real-time media, and WebRTC mandates it.

Conference Call Practice Test