Made Easy test series

Question

Consider a system using Go-Back-N protocol over fibre link with bandwidth 1Gbps and packet size 512B. Propagation speed of fibre is 2*10⁸m/sec with length 1Km. Assume error free and duplex communication with ACK packet size 64B. Then the value of N that yields maximum utilization of the sender is______?

Comments

Some cal mistake got 4 now.(3.56)

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3 should be the answer

not practical to send 4 since 3.56 packets can be accomodated hence 3

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Here it says duplex connection, meaning full duplex, so shouldn't we use N=1+a here instead of N= 1+2a?

Answer 1

When we want maximum utilization the numerator >= denominator (in mathematical terms)