Which device functions exclusively at the physical layer of the OSI model to amplify or regenerate weak electrical or optical network signals over extended distances? MCQ with Answer and Explanation
Which device functions exclusively at the physical layer of the OSI model to amplify or regenerate weak electrical or optical network signals over extended distances?
A. Gateway
B. Repeater
C. Router
D. Bridge
Answer: Option B
Solution (By JKSSB Mock Tests)
A repeater acts at Layer 1 to boost incoming electrical or optical signals, counteracting signal attenuation across long cable runs.
Explanation:
A Metropolitan Area Network (MAN) is larger than a LAN but smaller than a WAN, typically spanning a city block or urban community footprint.
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