You have been hired as a network consultant for a major aircraft engine manufact

Question

You have been hired as a network consultant for a major aircraft engine manufacturing company. The company promotes on its website that it allows downloading from its website all repair manuals. These manuals are approximately 2,360,000 bytes in size. The company expects that there will be approximately 60 users downloading the manual every hour.

What is the minimum type of communication line that you would want to have to support this demand? In order to obtain full credit on this assignment, you are to clearly outline all your assumptions and provide discussion to any calculations you provide. Utilize the provided resources and outside resources to back up your decisions.

Explanation / Answer

The size of the manual is 2360000 bytes = 2.36 Mb

The expected network usage for download is 60 users downloading the manual every hour.

This means that the network bandwidth must be greater than 60*2.36 = 141.6 Mb/hour

In the worst case scenario, we would be having all 60 downloads simultaneously by 60 users.

That means that the network bandwidth must atleast be 141.6 Mb/hr = 141.6/60 ~ 2 Mb/minute

The nearest to this figure is a 2 Mbps connection medium which would be sufficient enough to support 2Mb per minute of bandwidth for the users.

A 2mbps connection would give 2/8 = 256kbps of data transfer(upload/download) speed.

256*60 = 15360kb per minute which is 15.3 Mb per minute.

So it would take 141.6/15.3 = 9.25 minutes for all the 60 users to download in the worst case when all the users are downloading simultaneously.

For a 2Mbps connection we can either use a ethernet or fiber optic connection.

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