Question

Consider a switch handling the following types of traffic:

1. Five terminal screens each at 4 objects per second, where each object is 5 KBytes.

2. Ten simple email streams each at 4 emails per second, where each email size is 10 KBytes.

3. Four web page streams each at 3 pages per second, where each web page is 50 KBytes. What is the total offered load to the switch in Mbps?

Answer 1

Total offered load to the switch will be addition of load of all 3 scenarios.

Scenario 1:

5 terminals each with 4 objects per seconds gives total of 20 objects/sec.

Each object of size 5KB gives total of 20*5 = 100KBps from this scenario.

Scenario 2:

10 emails stream each with 4 emails per second will give 40 emails per second.

Each email size of 10KB gives total of 10*40 = 400KBps in this scenario.

Scenario 3:

4 web pages each with 3 pages per second gives 12 pages per second.

Each web page is 50KB gives total of 50*12 = 600KBps in this scenario.

Total traffic from all three scenario = 100 + 400 + 600 = 1100 KBps = 1100*8 Kbps = 1100*8/1024 Mbps = 8.59375 Mbps

Hence total load offered to switch is 8.59375 Mbps.