Back to the 2019 paper

Module 1: Physical Layer & Data Communication

20192m

For a 10 Mbps Ethernet link, if the length of the packet is 32 bits, the transmission delay is (in milliseconds):
(i) 3.2
(ii) 32
(iii) 0.32
(iv) None of the above

Worked SolutionAI Assisted

Answer

(iv) None of the above

Calculation

Transmission delay is:
Tt=LRT_t = \frac{L}{R}

where LL is packet length and RR is transmission rate.

Given:

  • L=32L=32 bits
  • R=10R=10 Mbps =10×106=10\times10^6 bits/s

Therefore:
Tt=3210×106=3.2×106T_t=\frac{32}{10\times10^6}=3.2\times10^{-6} s.

Convert to milliseconds:
3.2×106×1000=0.00323.2\times10^{-6}\times1000=0.0032 ms.

None of the listed numerical options equals 0.0032 ms.

Final answer: (iv) None of the above.

Similar questions