- A
Use plenum-rated cable; verify with a cable tester
Plenum-rated cable meets fire codes for ceiling spaces, and a cable tester checks for proper termination and continuity.
- B
Use PVC cable; verify with a multimeter
Why wrong: PVC cable is not fire-rated for plenums and may produce toxic smoke; a multimeter cannot test Ethernet integrity.
- C
Use shielded cable; verify with a toner probe
Why wrong: Shielded cable is for reducing interference, not fire safety; a toner probe identifies cables but does not verify integrity.
- D
Use fiber optic cable; verify with a loopback plug
Why wrong: Fiber optic cable is not typically used for standard Ethernet drops in offices, and a loopback plug is for copper NICs.
Question 44 of 1,020
Plenum-Rated Cable: Fire Safety and Integrity Testing
This 220-1201 practice question tests your understanding of networking tools. 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.
You are setting up a new branch office and need to run Ethernet cables through ceiling plenums. You must ensure the cables meet fire safety codes. Which type of cable should you use, and which tool would you use to verify its integrity after installation?
Quick Answer
The answer is to use plenum-rated cable and verify its integrity with a cable tester. Plenum-rated cable is required in air-handling spaces like ceiling plenums because its fire-resistant jacket and insulation produce minimal smoke and are self-extinguishing, preventing the spread of flames and toxic fumes through the building’s ventilation system. A cable tester is the correct tool to verify integrity after installation, as it checks for continuity, proper wiring, shorts, and signal performance, ensuring the cable meets operational standards. On the CompTIA A+ Core 1 220-1201 exam, this question tests your understanding of fire safety codes and physical network installation tools, often appearing as a scenario where you must distinguish plenum from PVC (riser) cable. A common trap is confusing a tone generator and probe (used for tracing cables) with a cable tester, which actually validates electrical connectivity. Memory tip: think “Plenum = Fire Prevention, Tester = Connection Perfection.”
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use plenum-rated cable; verify with a cable tester
Plenum-rated cable is required for installation in ceiling plenums because it is made with low-smoke, fire-retardant materials (e.g., FEP or PVDF) that do not emit toxic fumes or support flame spread, meeting fire safety codes such as NFPA 70 (NEC) Article 800. After installation, a cable tester (e.g., a wiremap tester or certification tool like a Fluke DSX) verifies integrity by checking for continuity, shorts, opens, and proper pin-to-pin wiring per T568A/B standards.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Use plenum-rated cable; verify with a cable tester
Why this is correct
Plenum-rated cable meets fire codes for ceiling spaces, and a cable tester checks for proper termination and continuity.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Use PVC cable; verify with a multimeter
Why it's wrong here
PVC cable is not fire-rated for plenums and may produce toxic smoke; a multimeter cannot test Ethernet integrity.
- ✗
Use shielded cable; verify with a toner probe
Why it's wrong here
Shielded cable is for reducing interference, not fire safety; a toner probe identifies cables but does not verify integrity.
- ✗
Use fiber optic cable; verify with a loopback plug
Why it's wrong here
Fiber optic cable is not typically used for standard Ethernet drops in offices, and a loopback plug is for copper NICs.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the distinction between fire safety ratings (plenum vs. riser vs. PVC) and functional cable types (shielded vs. unshielded), so candidates mistakenly choose shielded cable for fire safety or confuse a multimeter with a proper cable tester.
Detailed technical explanation
How to think about this question
Plenum-rated cables are jacketed with fluoropolymers like FEP (e.g., Teflon) that have a Limiting Oxygen Index (LOI) above 28%, meaning they self-extinguish and produce minimal smoke. Cable testers perform wiremap tests to detect split pairs, which can cause excessive crosstalk and degrade performance even if continuity appears fine; this is critical because a miswired cable in a plenum can lead to network failures that are expensive to troubleshoot after ceiling tiles are replaced.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A practitioner preparing for the 220-1201 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
Questions learners often ask
What does this 220-1201 question test?
Networking Tools — This question tests Networking Tools — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use plenum-rated cable; verify with a cable tester — Plenum-rated cable is required for installation in ceiling plenums because it is made with low-smoke, fire-retardant materials (e.g., FEP or PVDF) that do not emit toxic fumes or support flame spread, meeting fire safety codes such as NFPA 70 (NEC) Article 800. After installation, a cable tester (e.g., a wiremap tester or certification tool like a Fluke DSX) verifies integrity by checking for continuity, shorts, opens, and proper pin-to-pin wiring per T568A/B standards.
What should I do if I get this 220-1201 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jul 4, 2026
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