Data Link Control

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The Data Link Control (DLC) is a data transmission service that ensures the secure, error-free transmission of data via a non-storing, continuous transmission channel. This service is part of the OSI reference model and can be found in the data link layer .

It is implemented using a wide variety of data transmission protocols that are adapted to the respective transmission paths; as an example for analog Fe- modems the X-modem protocol.

There is a physical direct connection between two systems. The DLC divides the information to be transmitted into data blocks (so-called "frames"), operates error detection by adding error detection information and monitors the data flow (for example by protecting a slow receiver from an overflow by a fast transmitter) in an intermediate buffer is used at the endpoints, but not in transit.

There are two types 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 (incomplete list of protocols)

literature

  • Gurdeep S. Hura, Mukesh Singhal: Data and Computer Communications. Networking and Internetworking, CRC Press LLC, Boca Raton 2001, ISBN 0-8493-0928-X .
  • Kristof Obermann, Martin Horneffer: Data network technologies for Next Generation Networks. 1st edition, Vieweg + Teubner, Wiesbaden 2009, ISBN 978-3-8348-0449-5 .
  • Hugo Schröer, Thomas Stalke: The SNA network architecture . Friedrich Vieweg & Sohn Verlagsgesellschaft, Wiesbaden 1993, ISBN 978-3-322-91564-1 .

Web links