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n-Layer theroy question.... Wanted to check i am understanding the question

Posted on 2008-10-09
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A system has an n-layer protocol hierarchy. Applications generate messages of  length M bytes. At each of the layers, an h-byte header is added. Explain what fraction of the network bandwidth is filled with headers?


Am i correct in saying that the fraction of bandwith used depends on the amount of messages sent. As a header is added to each message that is sent & a header is added to every layer until it gets to  physical transmission.

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Question by:Vao
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tdor earned 500 total points
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Hello Vao,

As the packages go from the top layer to the physical the size of the actual package increases for each layer with a h header
the % of the bandwidth used by the headers*layers addons will always be the same
(only the _absolute_ number of bites represented by the headers*layers addons will vary as the _absolute_ number of packages varies)


Answer: n*h/(m+(n*h))
http://condor.depaul.edu/~jkristof/1999Aut463/1999Aut463-MidtermExam.txt


Regards,

tdor
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