What is a key feature of UDP in the Transport Layer?

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Accepted Answer

Low overhead and no connection - UDP (User Datagram Protocol) is a key protocol in the Transport Layer of the OSI model. One of its most important features is that it works without creating a connection between sender and receiver.

This is called a connectionless protocol. It means UDP does not check whether the data was delivered successfully or in the right order. It also does not send acknowledgments or use sequence numbers. Because of this, UDP has low overhead, which makes it fast and suitable for time-sensitive applications.

UDP is commonly used in:

Online games
Video streaming
Voice over IP (VoIP)
DNS (Domain Name System) lookups


These applications need speed more than guaranteed delivery. That’s why UDP is the preferred protocol for such tasks.

Conclusion: The correct answer is Low overhead and no connection. This feature makes UDP fast and lightweight, ideal for situations where performance is more important than perfect reliability.

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