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Multiple Choice

Which statement about UDP is true?

UDP is a connectionless protocol that sends datagrams with best-effort delivery, without guarantees of delivery, order, or protection against duplicates. This lack of reliability and ordering is exactly what makes UDP’s transfer unreliable and non-guaranteed. It doesn’t establish a connection with a three-way handshake before sending data—that’s a TCP feature. It also avoids the extra work of acknowledgments, retransmissions, and sequencing that TCP uses to ensure reliability. Because UDP doesn’t incur this setup or reliability overhead, it’s typically faster and has lower overhead than TCP.

UDP is a connectionless protocol that sends datagrams with best-effort delivery, without guarantees of delivery, order, or protection against duplicates. This lack of reliability and ordering is exactly what makes UDP’s transfer unreliable and non-guaranteed. It doesn’t establish a connection with a three-way handshake before sending data—that’s a TCP feature. It also avoids the extra work of acknowledgments, retransmissions, and sequencing that TCP uses to ensure reliability. Because UDP doesn’t incur this setup or reliability overhead, it’s typically faster and has lower overhead than TCP.