Is Zoom UDP or TCP?

Zoom primarily uses UDP (User Datagram Protocol) for real-time media transmission, such as audio and video, to ensure low-latency and high-quality communication during meetings. UDP is preferred in this case because it allows faster transmission of data packets without the overhead of ensuring delivery, which is important for real-time interactions.

However, TCP (Transmission Control Protocol) is also used when necessary. TCP ensures reliable, error-free delivery of data, and it is used in situations where UDP is not available or reliable enough (for example, if UDP is blocked by a firewall or network configuration).

Key Points:

• UDP: Used for audio, video, and screen sharing due to its low latency, which is essential for real-time communication.
• TCP: Used for non-time-sensitive data, such as text messages or when UDP is unavailable.
• SSL/TLS (Secure Sockets Layer): For secure connections, Zoom uses SSL/TLS to encrypt signaling traffic over TCP.

Conclusion:

Zoom primarily relies on UDP for real-time communication to ensure high performance, but it can fall back to TCP when necessary for reliable data transfer.