UPSC CAPF AC 2026 Paper 1 · Question 122

Question 122 of the UPSC CAPF (AC) 2026 Paper I (19 July 2026). Try it first, then open the answer and explanation.

1. CAPF 2026 · P-I · Q122 · General Science · Science & Technology

   Which one among the following transmission media is best suited for transmission of information over large distance?

   1. Twisted pair
   2. Optical fibre
   3. Thick Ethernet
   4. Thin Ethernet

   निम्नलिखित में से कौन-सा प्रेषण माध्यम (ट्रांसमिशन मीडियम) सूचना के सुदूर प्रेषण के लिए सर्वाधिक उपयुक्त है?

   1. ट्विस्टेड पेअर (twisted pair)
   2. ऑप्टिकल फाइबर
   3. थिक (thick) ईथरनेट
   4. थिन (thin) ईथरनेट
   Show answer

   Answer: (2) Optical fibre

   उत्तर: (2) ऑप्टिकल फाइबर

   Optical fibre carries data as light pulses with very low loss and very high bandwidth and is immune to electromagnetic interference, so it is used for long-haul and undersea links over many kilometres. Twisted pair (about 100 m per segment), thick Ethernet (500 m) and thin Ethernet (185 m) are short-distance copper media.

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