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In continuous ARQ will pullback uses _____ system.

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In continuous ARQ will pullback uses _____ system.

(a) Half duplex

(b) Full duplex

(c) Simplex

(d) None of the mentioned

This question was addressed to me in my homework.

This intriguing question originated from Link Budget Analysis and Error Control in section Communication Link Analysis of Digital Communications

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Right answer is (b) Full duplex

For explanation: The ARQ procedure called continuous ARQ with pullback requires full duplex connection.

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