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electronics and communication engineering satellite communication
1. In a stop-and-wait ARQ system, the transmitting terminal
(A): does not wait for acknowledgement after sending a block
(B): resends the previous block if negative acknowledgement is received through a NAK character
(C): sends another block if positive acknowledge is received through ACK character
(D): waits for positive or negative acknowled-gement from the receiving terminal after sending a block
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