N10-005 · Question #515
Which of the following cable types is employed to protect against interference in the physical environment or when security is a concern?
The correct answer is C. Fiber. Fiber optic cable transmits data as pulses of light rather than electrical signals, making it completely immune to electromagnetic interference (EMI) and radio frequency interference (RFI). It is also highly secure because it does not radiate a detectable electromagnetic field…
Question
Which of the following cable types is employed to protect against interference in the physical environment or when security is a concern?
Options
- ASTP
- BRG-6
- CFiber
- DRG-59
How the community answered
(45 responses)- A2% (1)
- C96% (43)
- D2% (1)
Explanation
Fiber optic cable transmits data as pulses of light rather than electrical signals, making it completely immune to electromagnetic interference (EMI) and radio frequency interference (RFI). It is also highly secure because it does not radiate a detectable electromagnetic field and is extremely difficult to tap without physically breaking the cable and causing a detectable signal loss. STP (Shielded Twisted Pair) reduces EMI but still carries electrical signals and can be tapped. RG-6 and RG-59 are coaxial copper cables used for cable TV and video - they offer some shielding but are susceptible to interference and are not considered secure transmission media.
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