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  KARTHICKRAJA S 1st MCA - B KGiSL Institute of Information Management Errors and Error Detection When bits are transmitted over the computer network, they are subject to get corrupted due to interference and network problems. The corrupted bits leads to spurious data being received by the receiver and are called errors. Error detection techniques are responsible for checking whether any error has occurred or not in the frame that has been transmitted via network. It does not take into account the number of error bits and the type of error. For error detection, the sender needs to send some additional bits along with the data bits. The receiver performs necessary checks based upon the additional redundant bits. If it finds that the data is free from errors, it removes the redundant bits before passing the message to the upper layers. There are three main techniques for detecting errors in frames: Parity Check, Checksum and Cyclic Redundancy Check (CRC). Checksums This is a block code m