Questions with Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A | Instant Download Pdf
1. A network cabling specialist is installing Category 6 cabling in a commercial
office. During testing, excessive crosstalk is detected. Which installation
error is the MOST likely cause?
A. Excessive untwisting of cable pairs at termination points
B. Using shorter patch cords
C. Installing cables above ceiling tiles
D. Labeling cables incorrectly
Answer: A
Rationale: Excessive untwisting degrades pair balance and increases
crosstalk.
2. A technician is asked to install backbone cabling between floors of a five-
story building. Which medium is generally MOST appropriate?
A. Category 3 UTP
B. Coaxial cable
C. Fiber-optic cable
D. Telephone wire
Answer: C
Rationale: Fiber provides high bandwidth, low attenuation, and immunity to
electromagnetic interference.
3. During a site survey, a technician identifies an area with significant
electromagnetic interference (EMI). Which cabling solution is BEST?
A. Unshielded twisted pair near power transformers
B. Fiber-optic cabling
C. Flat telephone cable
D. Category 3 cable
, Answer: B
Rationale: Fiber-optic cable is immune to EMI.
4. A newly installed network link fails certification because the measured
cable length exceeds standards. What is the MOST likely issue?
A. Exceeding maximum horizontal cable distance
B. Excessive labeling
C. Insufficient grounding
D. Incorrect color coding
Answer: A
Rationale: Structured cabling standards impose maximum horizontal run
lengths.
5. A technician accidentally damages the outer jacket of a fiber-optic cable
during installation. What should be done?
A. Ignore the damage
B. Inspect and replace or repair according to standards
C. Paint the damaged area
D. Wrap electrical tape around it and certify the link
Answer: B
Rationale: Jacket damage may compromise cable integrity and
performance.
6. Which tool is MOST commonly used to certify network cable performance?
A. Cable certification tester
B. Screwdriver
C. Wire brush
D. Voltage detector only
Answer: A
Rationale: Certification testers verify compliance with performance
standards.
7. A customer reports intermittent network connectivity. Testing reveals
excessive attenuation. What is the MOST likely cause?
A. Damaged cable or excessive distance
B. Correct termination
C. Proper grounding
, D. Updated firmware
Answer: A
Rationale: Attenuation increases with distance and cable damage.
8. What is the primary purpose of patch panels in structured cabling systems?
A. Increase wireless coverage
B. Provide organized cable termination and management
C. Replace network switches
D. Generate power
Answer: B
Rationale: Patch panels improve organization and maintenance.
9. A technician is terminating Category 6A cable. Why is maintaining pair
twists important?
A. Improves aesthetics
B. Preserves transmission performance
C. Reduces labeling requirements
D. Increases cable weight
Answer: B
Rationale: Twists reduce interference and signal degradation.
10.Which safety practice is MOST important when working in
telecommunications rooms?
A. Ignoring trip hazards
B. Following electrical and workplace safety procedures
C. Leaving cables unsecured
D. Disabling lighting
Answer: B
Rationale: Safety procedures reduce workplace injuries.
11.A network installation requires support for 10 Gigabit Ethernet over
copper. Which cable category is MOST suitable?
A. Category 3
B. Category 5
C. Category 6A
D. Telephone cable