What is Error Detection? What are its methods?

Data can be corrupted during transmission. For reliable communication errors must be deducted and Corrected. Error Detection uses the concept of redundancy, which means adding extra bits for detecting errors at the destination. The common Error Detection methods are

  a. Vertical Redundancy Check (VRC)

  b. Longitudinal Redundancy Check (VRC)

  c. Cyclic Redundancy Check (VRC)

  d. Checksum