CompTIA A+ Core 1 (220-1001) — Question 122

Which of the following is considered a connectionless protocol?

Answer options

• A. UDP
• B. TCP
• C. Telnet
• D. DNS

Correct answer: A

Explanation

UDP is the correct answer because it is a connectionless protocol that sends data without establishing a connection, making it suitable for applications that require speed over reliability. In contrast, TCP is connection-oriented, ensuring delivery and order, while Telnet and DNS are higher-level protocols that rely on TCP for connection management.