STOP AND WAIT FLOW CONTROL

  • Simplest form of flow control.
  • Not very efficient (time consuming).
  • A source entity transmits a frame to receiver, the receiver acknowledge the frame by sending the next frame until it receivers acknowledgement from the receiver.
  • If the source acknowledge a negative signal it means the frame may be lost while travelling or it may be damage or it contain error.

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TYPES OF ERROR

Error control refers to the mechanism of detect and correct errors that occurs at the time of transmission of data.

LOST FRAME

A frame fail to arrive at other side i.e. (either). A noise signal may damage a frame to the extent that receiver is aware that a frame is being transmitted.

DAMAGE FRAME

A recognizable frame may arrive but some of the bits are in error.

 

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