Question

What kind of transmission medium is most appropriate to carry data in a computer network that is exposed to electrical interferences?

• A. Unshielded twisted pair
• B. Optical fibre
• C. Coaxial cable
• D. Microwave

Hint:

In environments with high electromagnetic interference, optical fibre is the preferred choice as it uses light to transmit data and is not affected by external electrical noise.

Answer 1

The Correct Option is B

The correct answer is Optical fibre.
Optical fibre is the most appropriate transmission medium in environments where there is a high level of electrical interference. Unlike electrical cables (e.g., unshielded twisted pair, coaxial), optical fibre uses light to transmit data, making it immune to electromagnetic interference (EMI). Optical fibres are made of glass or plastic, and the data is transmitted as light pulses rather than electrical signals, which ensures that it is not affected by external electrical noise.
Explanation of Other Options:
(A) Unshielded twisted pair (UTP):
Unshielded twisted pair is a common transmission medium, but it is susceptible to electrical interference because it uses electrical signals to transmit data. The twisted pair of wires does provide some protection, but it is not as resistant to EMI as optical fibre.
(C) Coaxial cable:
Coaxial cables are shielded cables that can provide better resistance to electrical interference compared to UTP cables, but they are still susceptible to some amount of EMI. They are more robust than UTP cables but are not as effective as optical fibre in environments with significant electrical interference.
(D) Microwave:
Microwave transmission refers to the use of high-frequency radio waves to transmit data, typically used in wireless communications. While microwave communication can be effective for long-distance data transfer, it is also susceptible to interference from physical obstacles and weather conditions, and it is not suitable for networks exposed to electrical interference.
Summary:

- Optical fibre is the best medium for environments with electrical interference due to its immunity to electromagnetic noise.
-Unshielded twisted pair (UTP) andCoaxial cables are both electrical transmission mediums, and while coaxial cables offer some shielding, they are still susceptible to EMI.
-Microwave is used for wireless communication but is not ideal for environments with electrical interference.