200-301 Question #55: Real Exam Question with Answer & Explanation

Question

How do TCP and UDP differ in the way that they establish a connection between two endpoints?

Options

• ATCP uses synchronization packets, and UDP uses acknowledgment packets.
• BUDP uses SYN,SYN ACK and FIN bits in the frame header while TCP uses SYN,SYN ACK and
• CUDP provides reliable message transfer and TCP is a connectionless protocol
• DTCP uses the three-way handshake and UDP does not guarantee message delivery

Explanation

This question differentiates TCP and UDP based on their connection establishment methods and message delivery guarantees.

Common mistakes.

• A. While TCP uses synchronization (SYN) for connection setup and acknowledgments (ACK) for reliability, UDP is connectionless and does not use acknowledgment packets for establishing a connection or guaranteeing delivery.
• B. SYN, SYN-ACK, and FIN bits are control flags used exclusively by TCP for connection establishment and termination, not by UDP, which is a connectionless protocol.
• C. This statement is incorrect; TCP provides reliable, connection-oriented message transfer, whereas UDP is a connectionless protocol that does not guarantee message reliability.

Concept tested. TCP three-way handshake vs UDP connectionless

Reference. https://learn.microsoft.com/en-us/windows/win32/winsock/protocol-parameters-2

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