Project ForgeComputer Networks
OSI/TCP-IP Layers & Routing
GATE 2007
Medium
In a token ring network, the transmission speed is 10⁷ bps and the propagation speed is 200 metres/μs. The 1-bit delay in this network is equivalent to:
- A500 metres of cable
- B200 metres of cable
- 20 metres of cable
- D50 metres of cable
Explanation
Transmission time per bit = 1/(10⁷ bps) = 0.1 μs. Equivalent cable length = propagation speed × time = 200 m/μs × 0.1 μs = 20 metres.
Source: GATE CS 2007 (2007)
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