What isData Link Control (DLC)

Data Link Control (DLC) is a service provided by the data link layer that deals with procedures for communication between two adjacent nodes, regardless of whether the link is dedicated or broadcast. Its functions include framing, flow control, and error control, which ensure that there is reliable data transfer over the physical medium.

Each network interface card has a DLC address, such as a 48-bit MAC address, that identifies the card. There is also a network protocol called Data Link Control that is used by IBM SNA mainframes and compatible peripherals and equipment. It is often used for communication between devices connected to the network, such as printers, computers, and servers.

The data link layer provides coordination between devices so that no collisions occur during half-duplex transmission mode, where only one device can transmit data at a time. Earlier versions of Windows supported DLC, but versions of Windows XP onwards do not include support for DLC.

FAQs:

What is the role of DLC in data communication?

The main role of DLC is to provide reliable data transfer over the physical medium by handling procedures for communication between two adjacent nodes. Its functions include framing, flow control, and error control.

What is DLC address?

A DLC address is an address that identifies each network interface card. For example, Ethernet and other types of cards have a 48-bit MAC address built into the firmware of the cards when they are manufactured.

What is the use of Data Link Control protocol?

Data Link Control (DLC) protocol is used by IBM SNA mainframes and compatible peripherals and equipment for communication between devices connected to the network, such as printers, computers, and servers.

Final Thoughts

DLC plays a crucial role in ensuring reliable data transfer between devices on a network. Its functions include flow control, error control, and framing. It is important to understand how DLC works in order to troubleshoot network issues and ensure the efficient operation of a network.

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