Which of the following is a common use case for UDP?

• A. Live video streaming, where speed is more critical than accuracy.
• B. Web browsing, where data integrity is crucial.
• C. Email delivery.
• D. Remote login to devices.

Answer: (A)

The use case being tested is that UDP is well suited for real-time, low-latency communication where some data loss is acceptable. UDP is connectionless and does not guarantee delivery, order, or error correction. That lower overhead and faster delivery makes it ideal for live video streaming, where getting frames out quickly is more important than perfect accuracy—a small amount of lost or dropped packets won’t ruin the overall experience and can prevent disruptive delays.

The other scenarios typically rely on reliable delivery and correct sequencing, which TCP provides. Web browsing, email delivery, and remote login all depend on getting every piece of data accurately and in order, so they are commonly done over TCP rather than UDP.