# Computer Networking : A Top-down Approach

 Authors: James F. Kurose, Keith W. Ross ISBN: 9780132856201 Edition: 6
 Chapter: Computer Networks And The Internet Exercise: Problems Question: 12

### Question by Anonymous on 21 Mar, 2016 at 04:02 AM

A packet switch receives a packet and determines the outbound link to which

the packet should be forwarded. When the packet arrives, one other packet is halfway done being transmitted on this outbound link and four other packets are waiting to be transmitted. Packets are transmitted in order of arrival.

Suppose all packets are 1,500 bytes and the link rate is 2 Mbps. What is the queuing delay for the packet? More generally, what is the queuing delay when all packets have length L, the transmission rate is R, x bits of the currently-being-transmitted packet have been transmitted, and n packets are already in the queue?

### Answer by Nethan on 21 Mar, 2016 at 04:02 AM

Consider the given data: ### Discussions ### Geroge on 09 Feb, 2019 at 07:08 AM

Given data:
L=Length of packet=1500 bytes
R=Rate of transmission =2Mbps
x=Current transmit packet=L/R=1500/2=750
n=Waiting queue=4
Queuing delay=(nL+(L-x))/R
=(4*1500)(1500-750)/2
=6750/2
=3375 Mbps
=0.033 seconds

Post the discussion improve the above solution.