Which statement about UDP is true?

• A. It uses a three-way handshake before data transfer.
• B. It does not guarantee delivery, order, or error checking.
• C. It always requires a response from the destination.
• D. It always encrypts payload data.

Answer: (B)

UDP is a connectionless, best-effort protocol that sends datagrams without establishing a session or ensuring delivery. It does not guarantee that packets will arrive, arrive in the order they were sent, or be free from errors that would require recovery. There is a simple checksum to detect some corruption, but UDP offers no guarantees of error-free delivery or any retransmission, sequencing, or flow control at the transport layer. So the statement about lacking guarantees for delivery, order, and error checking captures UDP’s basic behavior. The other points don’t fit: UDP does not use a three-way handshake, does not require a response from the destination, and does not inherently encrypt payload data.