CompTIA A+ Core 1 (220-1101) — Question 133

A technician is working on a desktop PC and wants to verify its NIC is functional. Which of the following should the technician use?

Answer options

• A. Cable tester
• B. Loopback plug
• C. Toner probe
• D. Network tap

Correct answer: B

Explanation

The correct answer is B, the Loopback plug, as it allows the technician to send and receive signals through the NIC to verify its functionality. The Cable tester (A) checks the integrity of cables, not the NIC itself; the Toner probe (C) is used for tracing cables, and the Network tap (D) is for monitoring network traffic, neither of which directly tests the NIC.