What transport layer protocol does DNS normally use?

Understand the Problem

The question is asking about the transport layer protocol commonly used by the Domain Name System (DNS). DNS primarily uses specific protocols for its operations, focusing on how it communicates over a network.

Answer

UDP

DNS normally uses UDP as its primary transport protocol.

More Information

DNS typically uses UDP due to its low latency, but it may use TCP for tasks such as zone transfers and queries exceeding the size of a UDP packet.

Tips

A common mistake is assuming DNS solely uses TCP; it is important to remember UDP is primarily used.

Sources

Google Cloud - Transport protocols and DNS - cloud.google.com
Wikipedia - Domain Name System - en.wikipedia.org

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