Quick Answer
The answer is a cable tester, as this is the specific tool designed to verify Ethernet wiring and detect breaks in twisted-pair cables. A cable tester works by sending a small electrical signal through each conductor in the cable, then checking for continuity, correct pin-to-pin mapping according to standards like T568A or T568B, and identifying any shorts or opens. On the CompTIA ITF+ FC0-U61 exam, this question tests your understanding of basic network troubleshooting tools, often appearing in a scenario where a technician must confirm proper cable termination before deployment. A common trap is confusing a cable tester with a multimeter or a tone generator; remember that a multimeter measures voltage or resistance but cannot verify pinout order, while a tone generator only traces a cable’s path. For a memory tip, think of the cable tester as the “wiring proofreader”—it checks that every wire is in its correct place and that the path is clear from end to end.
This FC0-U61 practice question tests your understanding of infrastructure. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A technician needs to verify that a twisted-pair Ethernet cable is wired correctly and has no breaks. Which tool should be used?
Multimeter
Why wrong: Multimeters measure electrical properties like voltage and resistance, not cable wiring.
Loopback plug
Why wrong: Loopback plugs test network interface cards, not the cable itself.
Cable tester
Cable testers verify pinouts, continuity, and proper wiring of Ethernet cables.
Toner probe
Why wrong: Toner probes are used to trace cables within walls, not for verifying wiring.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Cable tester
A cable tester sends signals through each conductor in the twisted-pair cable and checks for continuity, correct pin-to-pin wiring (e.g., T568A or T568B), and shorts or opens. This makes it the correct tool to verify proper wiring and detect breaks in an Ethernet cable.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Multimeter
Why it's wrong here
Multimeters measure electrical properties like voltage and resistance, not cable wiring.
Loopback plug
Why it's wrong here
Loopback plugs test network interface cards, not the cable itself.
Cable tester
Why this is correct
Cable testers verify pinouts, continuity, and proper wiring of Ethernet cables.
Related concept
Read the scenario before looking for a memorised answer.
Toner probe
Why it's wrong here
Toner probes are used to trace cables within walls, not for verifying wiring.
Common exam traps
The trap here is that candidates confuse a multimeter's ability to check continuity with the cable tester's ability to verify correct pairing and wiring standards, leading them to choose the multimeter when only a cable tester can confirm proper Ethernet wiring.
Detailed technical explanation
A cable tester works by sending a series of pulses down each wire pair and measuring the reflected signal or comparing the received pattern against the expected standard (e.g., T568A/B). It can detect faults like split pairs, where wires are connected to the correct pins but not twisted with the correct partner, which causes crosstalk and degrades performance even though continuity appears fine. In real-world troubleshooting, a simple continuity check with a multimeter would miss this subtle but critical issue.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A practitioner preparing for the FC0-U61 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
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FAQ
Infrastructure — This question tests Infrastructure — Read the scenario before looking for a memorised answer..
The correct answer is: Cable tester — A cable tester sends signals through each conductor in the twisted-pair cable and checks for continuity, correct pin-to-pin wiring (e.g., T568A or T568B), and shorts or opens. This makes it the correct tool to verify proper wiring and detect breaks in an Ethernet cable.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 25, 2026
This FC0-U61 practice question is part of Courseiva's free CompTIA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the FC0-U61 exam.
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