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True / False?

Selective repeat ARQ requires more number of bits in sequence number as compared to Go Back n ARQ.
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yes, that is correct. in GBN & SR protocol to have the same sender window size, in GBN if we need n bits then in SR protocol we will need n+1 bits. With n sequence bits in GBN sender window size can be up to $2^n-1$, while in SR protocol sender window size can only be up to 2^(n-1)
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it should be true if they mention to maintain same window size.but here not mentioned so its not true

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