CCNA Routing and Switching (legacy) — Question 136

What are three characteristics of the TCP protocol? (Choose three.)

Answer options

• A. It uses a single SYN-ACK message to establish a connection.
• B. The connection is established before data is transmitted.
• C. It ensures that all data is transmitted and received by the remote device.
• D. It supports significantly higher transmission speeds than UDP.
• E. It requires applications to determine when data packets must be retransmitted.
• F. It uses separate SYN and ACK messages to establish a connection.

Correct answer: B, C, F

Explanation

The correct answers are B, C, and F because TCP establishes a connection through a three-way handshake using separate SYN and ACK messages (F) and ensures reliable data transmission (C). Option A is incorrect as it misrepresents the connection establishment process, while D incorrectly claims TCP supports higher speeds than UDP, which is not true. Option E is also incorrect because TCP handles retransmissions automatically.