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I am slightly confused in 40 Gbps. 

When to use 2^30 and when to use 10^3 in conversion.

2 Answers

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I think 10^3 is used for KB but it is for bandwidth & 2^30 is used for GB it is for data.

see data is always in binary form so we have only two no. that is 0,1 that’s why we have used 2^n for data bits & for bandwidth it can’t be in discrete form it can be any no. that’s why we have used to 10^n for bandwidth.

that is decimal system is used in bandwidth & binary system used in for data.

simply  in Decimal SI (base 10), 1 Kilobyte is equivalent to 1000 bytes. On the other hand in Binary (base 2) system, 1 Kilobyte is equal to 1024 bytes.

edited by
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in case of bandwidth we use 10^x

in case of data we use 2^x

here we should use 10^9 thus more appropriate answer is 0.8589934592

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