Huawei Certified ICT Associate – Data Center Network (HCIA-DCN) — Question 128

UDP is connectionless. As such, which of the following must be used to ensure transmission reliability?

Answer options

• A. Application layer protocol
• B. Internet protocol
• C. Network layer protocol
• D. Transmission Control Protocol

Correct answer: A

Explanation

The correct answer is A, as an application layer protocol can implement its own reliability mechanisms on top of UDP. Options B and C do not provide reliability functions, and D refers to Transmission Control Protocol, which is inherently connection-oriented and not applicable to UDP's connectionless nature.