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1. |
Data link layer retransmits the damaged frames in most networks. If the probability of a frame's being damaged is p, what is the mean number of transmissions required to send a frame if acknowledgements are never lost. |
A. | P I (K + 1) |
B. | KIK (1 + F) |
C. | 1/ (1 - F) |
D. | K I (K - P) |
Answer» D. K I (K - P) | |