Error detection techniques Used by the receiver to determine if a packet contains errors If a packet is found to contain errors the receiver requests the transmitter to re-send the packet Error detection techniques Parity check E.g, single bit Cyclic redundancy check(CRC)Error detection techniques • Used by the receiver to determine if a packet contains errors • If a packet is found to contain errors the receiver requests the transmitter to re-send the packet • Error detection techniques – Parity check E.g., single bit – Cyclic redundancy check (CRC)