Data Link Control

The Data Link Control (DLC ) is a data transmission service that provides for secure, error-free transmission of data via a non-latching, through transmission channel. This service is part of the OSI reference model and can be found in the Data Link Layer.

It is realized by a variety of data transfer protocols, which are adapted to the respective transmission paths; as an example of analogous Fe modems the X-Modem protocol.

Here there is a direct physical connection between two systems. DLC divides the information to be transmitted in data blocks ( the so-called "frames" ) that operates error detection through the addition of error detection information, and controls the flow of data (for example, by preserving a slow receiver before an overflow by a fast channel ) in which an intermediate buffer is at the end points, but not used in the transmission path.

There are two kinds of protocols, point - to -point and multicast protocols. With multicast, the Data Link Control is divided into two layers, Logical Link Control and Media Access Control.

See also ( partial list of protocols )

  • High - Level Data Link Control (HDLC )
  • Synchronous Data Link Control ( SDLC)
  • Link Access Procedure Balanced ( LAPB )
  • Advanced Data Communications Control Procedure ( ADCCP )
  • X.25
  • Serial Line Internet Protocol ( SLIP)
  • Point-to- Point Protocol (PPP )
  • Media Access Control (MAC)
  • Ethernet (IEEE 802.3)
  • Token Bus (IEEE 802.4 )
  • Token Ring (IEEE 802.5 )
XModem Point-to-Point Protocol
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