When a new network drop was installed, the cable was run across several fluorescent lights. The users of the new network drop experience intermittent connectivity. Which of the following environmental

The correct answer is B. EMI shielding. EMI (Electromagnetic Interference) shielding was the overlooked control. Fluorescent lights are a well-known source of electromagnetic interference. When unshielded or improperly shielded network cables (such as UTP) are routed parallel to or across fluorescent light fixtures, th

Security architecture

Question

When a new network drop was installed, the cable was run across several fluorescent lights. The users of the new network drop experience intermittent connectivity. Which of the following environmental controls was MOST likely overlooked during installation?

Options

AHumidity sensors
BEMI shielding
CChannel interference
DCable kinking

How the community answered

(18 responses)

A
6% (1)
B
89% (16)
C
6% (1)

Explanation

EMI (Electromagnetic Interference) shielding was the overlooked control. Fluorescent lights are a well-known source of electromagnetic interference. When unshielded or improperly shielded network cables (such as UTP) are routed parallel to or across fluorescent light fixtures, the EMI induces noise on the copper conductors, causing intermittent connectivity issues. The fix is to use shielded cable (STP) or reroute the cable away from the lights. Humidity sensors, channel interference (a wireless concern), and cable kinking are not caused by proximity to fluorescent lights.

Topics

#EMI shielding#network cabling#environmental controls#physical security

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