CompTIA A+ Core 1 (220-1101) — Question 394

An administrator is replacing a cable that uses a DB9 connector. Which of the following cables is the administrator replacing?

Answer options

• A. Parallel
• B. Serial
• C. Optical
• D. USB

Correct answer: B

Explanation

The correct answer is B, Serial, because DB9 connectors are primarily used for serial communication. Options A (Parallel), C (Optical), and D (USB) do not utilize DB9 connectors and serve different purposes in connectivity.