Checking for errors Let T be the received sequence Divide T by G If remainder =0 assume no errors If remainder is non zero errors must have occurred Example 1001|110101011 Send t=110l01011 1001 Receive t=110101011 (no errors) 01000 0001101 No way of knowing how many errors occurred or which bits are 01001 In error 1001 000=> No errorsChecking for errors • Let T’ be the received sequence • Divide T’ by G – If remainder = 0 assume no errors – If remainder is non zero errors must have occurred Example: 1001 Send T = 110101011 110101011 Receive T’ = 110101011 (no errors) No way of knowing how many errors occurred or which bits are In error 1001 01000 1001 0001101 1001 01001 1001 000 => No errors