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20°, , 117, , petection and Correction, a, , , , , Retransmission, Error correction is done by asking sender, to send the data again., It involves sender on the detection of, , or _——Forward Error Correction, -k<—Frror correction is done by using, R ~ radundant bits and guessing., , I], , ait tt doesn't involve sender on the detection, , : of error. error., It is applied on long message where | It is applied on short message where, chances of error is less. chances of error is more., , 4. The result is not always correct finally. The result is correct finally., 5. It is usually used for correcting single bit | It is usually used for correcting multi bit, , errors. errors., 6. It takes less time for the correction of | It takes more time for the correction of, data. data, , 1. Redundant bits may be used for the | Redundant bits are not used for the, correction of data. correction of the data., , , , Table. 6.6 : Forward Error Correction V/S Retransmission