Error Detection- Checksum Method
What is Error..? Why does error occur..? How to detect Errors..? ⧳ Error in computer networking occurs when receiver's information does'nt match with sender's information. There can be several reasons which cause errors. Generally error occurs during transmission of digital signals, while transmitting signals they may suffer from noise which introduces errors in binary bits. Error in binary bits can change polarity of binary bits i.e. 0 converts into 1 or vice versa. To detect errors we add specific codes either in data link layer or Transport layer of OSI Model. When any message transmits, it may get corrupted or scrambled by noise. To avoid this weadd additional data in specific manner. Here we are going to see how Checksum method of error detection works. Checksum : In checksum method, first we get the data which is to be transmitted (D), then we divide that data into equal checksum bits (m) {m=8,16,32,.....} into D1,D2,D3,..... After this process we perform additi