220-1101 · Question #68
A technician is receiving reports that the entire office sporadically loses network connectivity throughout the day. The technician determines the root cause to be EMI. Which of the following cable…
The correct answer is B. Shielded Cat 6. EMI (Electromagnetic Interference) disrupts unshielded copper cabling. Shielded Twisted Pair (STP) cables like Shielded Cat 6 include a metallic foil or braid around the conductors that blocks external electromagnetic interference - directly addressing the root cause. Coaxial…
Question
A technician is receiving reports that the entire office sporadically loses network connectivity throughout the day. The technician determines the root cause to be EMI. Which of the following cable mediums would be the MOST cost effective without sacrificing system performance?
Options
- ACoaxial
- BShielded Cat 6
- CPlenum Cat 5e
- DMultimode fiber
How the community answered
(21 responses)- A14% (3)
- B81% (17)
- D5% (1)
Explanation
EMI (Electromagnetic Interference) disrupts unshielded copper cabling. Shielded Twisted Pair (STP) cables like Shielded Cat 6 include a metallic foil or braid around the conductors that blocks external electromagnetic interference - directly addressing the root cause. Coaxial cable (A) is outdated for modern office LANs and not a practical replacement. Plenum Cat 5e (C) uses fire-resistant jacketing for HVAC spaces but is unshielded - it does nothing to mitigate EMI. Multimode fiber (D) is completely immune to EMI and would work, but it is significantly more expensive to install (requires fiber-compatible switches, different connectors, and specialized installation). Shielded Cat 6 solves the EMI problem at a fraction of the cost of a fiber upgrade.
Topics
Community Discussion
No community discussion yet for this question.