Exam-style question
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A telecommunications company needs to connect two cities 300 km apart for a high‑bandwidth internet backbone while keeping costs low. Which transmission media should they select?.
- A.Copper cable
- B.Fiber optic
- C.Wireless microwave
- D.Satellite
Model answer
What a good answer should say
- Fiber optic
Explanation
Why this works
Rule: Choose media that minimise attenuation over long distances and provide high bandwidth at reasonable cost. Substitution: long distance (300 km), high bandwidth, low cost.
Working: Fiber optic has negligible attenuation over hundreds of kilometres, supports very high data rates, and is cheaper per kilometre than copper or satellite. Answer: Fiber optic.
Conclusion: Fiber optic is the suitable media.
Common mistake
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