Interactive end-of-chapter exercises


Supplement to Computer Networking: A Top Down Approach 8th Edition


"Tell me and I forget. Show me and I remember. Involve me and I understand." Chinese proverb

Textbook Cover

Computing the one-hop transmission delay

Consider the figure below, in which a single router is transmitting packets, each of length L bits, over a single link with transmission rate R Mbps to another router at the other end of the link.


network


Suppose that the packet length is L= 12000 bits, and that the link transmission rate along the link to router on the right is R = 1000 Mbps.

Round your answer to two decimals after leading zeros



Question List


1. What is the transmission delay?

2. What is the maximum number of packets per second that can be transmitted by this link?




Solution


The transmission delay = L/R = 12000 bits / 1000000000 bps = 1.20E-5 seconds

The number of packets that can be transmitted in a second into the link = R / L = 1000000000 bps / 12000 bits = 83333 packets



That's incorrect

That's correct

The answer was: 1.20E-5

Question 1 of 2

The answer was: 83333

Question 2 of 2

Try Another Problem

We gratefully acknowledge the programming and problem design work of John Broderick (UMass '21), which has really helped to substantially improve this site.

Copyright © 2010-2021 J.F. Kurose, K.W. Ross
Comments welcome and appreciated: kurose@cs.umass.edu