Alcatel-Lucent NRS I Composite Exam — Question 13

Which statement accurately explains the purpose of the TCP protocol and what it provides?

Answer options

• A. The primary purpose of TCP is to provide reliable communications between application services.
• B. The primary purpose of TCP is to provide unreliable communications between application services
• C. The primary purpose of TCP is to provide IP routing between application services.
• D. The primary purpose of TCP is to define the correct format for the application layer such as JPEG or HTML.

Correct answer: A

Explanation

The correct answer is A because TCP is designed to ensure reliable data transmission between application services through error checking and retransmission. Option B is incorrect as TCP is not an unreliable protocol. Options C and D misrepresent TCP's functionality, as TCP does not handle IP routing or define application layer formats.