Consider a source that is sending on/off traffic (as in a square wave). In parti
ID: 3890090 • Letter: C
Question
Consider a source that is sending on/off traffic (as in a square wave). In particular, for 0.5 seconds, it sends data traffic at a rate of 12 Mbps then it does not send any data traffic for 2 seconds. This process repeats. If this traffic is going through a router that has 10 Mbps capacity and a buffer of size B bits...
a) What is the average throughput achieved by this source? (your answer should be in Mbps)
b) How large B should be to prevent any data loss (that is to accommodate each square burst and buffer it)?
c) If we would like to remove this buffer, but still would like the source to send the same amount of data per burst, how would you choose the on period and the data rate?
Explanation / Answer
1.for each 2.5 second it sends 6mb
Throughout=6/2.5
2.4 mbps
2.it has capacity of 5mb for 0.5s
data sent is 6mb,buffer=1mb
3.the data rate can be decreased to 6mbps
The period is also increased to 1s which gives 6mb each second less than capacity of 10mb.