In SITOR ARQ operation, which method ensures reliability?

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Multiple Choice

In SITOR ARQ operation, which method ensures reliability?

In SITOR ARQ operation, reliability comes from duplicating every character transmitted. By sending each character twice, the receiver can compare the two copies and detect any mismatch caused by transmission errors. When a pair doesn’t match, the ARQ process kicks in and requests a retransmission of the erroneous data, ensuring that only correct information is accepted. This simple redundancy paired with a back-and-forth acknowledgment mechanism provides dependable delivery without needing forward error correction. The other statements mix in concepts (like FEC) that aren’t the mechanism by which ARQ achieves reliability, and they imply conditions (such as not needing a two-way link or pre-exchange of acknowledgments) that don’t fit how SITOR ARQ operates.

In SITOR ARQ operation, reliability comes from duplicating every character transmitted. By sending each character twice, the receiver can compare the two copies and detect any mismatch caused by transmission errors. When a pair doesn’t match, the ARQ process kicks in and requests a retransmission of the erroneous data, ensuring that only correct information is accepted. This simple redundancy paired with a back-and-forth acknowledgment mechanism provides dependable delivery without needing forward error correction.

The other statements mix in concepts (like FEC) that aren’t the mechanism by which ARQ achieves reliability, and they imply conditions (such as not needing a two-way link or pre-exchange of acknowledgments) that don’t fit how SITOR ARQ operates.

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