How does forward error correction (FEC) allow the receiver to correct data errors?
By controlling transmitter output power for optimum signal strength
By using the Varicode character set
By transmitting redundant information with the data✓Bonne réponse
By using a parity bit with each character
Explication
FEC adds mathematically derived redundant bits to the data stream, and that redundancy is what lets the receiver reconstruct corrupted bits on its own. A parity bit only detects that an error occurred; it cannot correct one.