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Error Detection

Vertical Redundancy Check (VRC)

Suppose we want to transmit the binary data unit 1100001, adding the number of 1s gives us 3, an odd number. Before transmitting, a parity generator counts the 1s and appends the parity bit (a 1 in this case) to the end. The total number of 1 becomes 4 now (even number). The system now transmits the entire appended unit across the network link.