The correct choice is a plenum-rated jacket because fire safety codes mandate that cables installed in air handling spaces must not emit toxic fumes or support flame propagation. Plenum-rated cables are constructed with materials like fluorinated ethylene propylene (FEP) or low-smoke PVC, which self-extinguish and produce minimal smoke, unlike standard PVC jackets that release hazardous hydrochloric acid gas when burned. On the CompTIA A+ Core 1 220-1201 exam, this question tests your understanding of network installation best practices and local building codes, often appearing as a scenario where you must choose between plenum, riser, or PVC cable. A common trap is selecting “riser-rated” cable, which is only approved for vertical shafts between floors, not for air plenums. Remember the memory tip: “Plenums push air, so pick the jacket that won’t push poison.”
220-1201 Cabling Practice Question
This 220-1201 practice question tests your understanding of cabling. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 is installing a new network in a school and must run cables through air handling plenums. What type of cable jacket is required for this installation?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Plenum-rated jacket
Plenum-rated cables have a special jacket that does not emit toxic fumes when burned, required by fire codes for air handling spaces. PVC cables are not allowed because they produce hazardous smoke. This is a safety and code compliance issue.
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.
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PVC jacket
Why it's wrong here
PVC cables are not plenum-rated and produce toxic smoke in a fire, making them unsafe for air handling spaces.
✓
Plenum-rated jacket
Why this is correct
Plenum-rated cables are designed for use in air plenums and meet fire safety codes.
Related concept
Read the scenario before looking for a memorised answer.
✗
Shielded jacket
Why it's wrong here
Shielding protects against EMI, but it does not address fire safety requirements for plenum spaces.
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Riser-rated jacket
Why it's wrong here
Riser-rated cables are for vertical runs between floors, not for air handling plenums.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this 220-1201 question in full detail.
Identify which 220-1201 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Cabling — This question tests Cabling — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Plenum-rated jacket — Plenum-rated cables have a special jacket that does not emit toxic fumes when burned, required by fire codes for air handling spaces. PVC cables are not allowed because they produce hazardous smoke. This is a safety and code compliance issue.
What should I do if I get this 220-1201 question wrong?
Identify which 220-1201 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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