For internal data communication through a computer network, a 5-layer protocol…

2023

For internal data communication through a computer network, a 5-layer protocol hierarchy is proposed. Applications used in this network generate 270-byte messages. At each layer, a 6-byte header is added. What fraction of network bandwidth (in %) is wasted due to headers?

  1. A.

    5%

  2. B.

    20%

  3. C.

    10%

  4. D.

    15%

Attempted by 233 students.

Show answer & explanation

Correct answer: C

First, calculate the total header overhead. With 5 layers and a 6-byte header at each layer, the total overhead is 5 * 6 = 30 bytes. Next, find the total packet size by adding the original message size to the overhead: 270 + 30 = 300 bytes. Finally, calculate the fraction of bandwidth wasted due to headers by dividing the overhead by the total packet size: 30 / 300 = 1/10. Converting this fraction to a percentage gives 10%.

Explore the full course: Isro