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A computer system has a 7 - layer protocol hierarchy. Applications generate messages of length 5 0 0 bytes. At the data link layer, a

A computer system has a

7 -

layer protocol hierarchy. Applications generate messages of

length

500

bytes. At the data link layer, a

30 -

byte header and

4 -

byte trailer are added. At

the remaining

6

layers, a

20 -

byte header is added. What fraction of the network

bandwidth is filled with headers?

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