Data Link Control (DLC)

Last Updated: August 18, 2011

Definition - What does Data Link Control (DLC) mean?

A data link control is a service that ensures reliable network data communication by managing frame error detection and flow control. DLC is based on the Data Link layer of the OSI model.

DLC handles the following tasks:

Reliable link packet transmission
Recovery and error detection during high-layer packet retransmission
Error framing, which determines start and end packetization via three approaches: length counts, bit-oriented framing and character-oriented framing

DLC character codes are based on standard character codes, such as the American Standard Code for Information Interchange (ASCII). Extended Binary Coded Decimal Interchange Code (EBCDIC) is comprised of hidden characters.

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Techopedia explains Data Link Control (DLC)

DLC device contexts are as follows:

IBM Systems Network Architecture (SNA) computers and peripherals
Local area network (LAN) communication with computers, servers and printers
Windows 2000 32-bit programs with communication drivers and other DLC network protocol stacks
Ethernet media access control (MAC) drivers or token rings that transmit digital frames
MS DOS and Windows 16-bit programs
COBOL Copybook Importer (CCBI) 16-bit interfaces
Institute of Electrical and Electronics Engineers (IEEE) 802.2 class I and II service transmission interfaces and other Ethernet network frames
Dynamic link libraries in Windows-compliant network interface cards (NIC)