Data Link Control
Data Link Control (DLC)[編集]
Contents[編集]
- Overview
- Role in Systems Network Architecture (SNA)
- Functionality within OSI Model
- Protocols and Standards
- Applications and Examples
- References
1. Overview[編集]
Data Link Control (DLC) is a set of protocols or rules used for transmitting data over a network. It plays a crucial role in the data communication process by ensuring the reliable and efficient transfer of data between network nodes.
2. Role in Systems Network Architecture (SNA)[編集]
In the context of IBM's Systems Network Architecture, DLC is integral to providing data link services. SNA, a proprietary IBM architecture, uses DLC to facilitate communication between different types of computer hardware and software. DLC in SNA is responsible for error detection and recovery, as well as flow control.
3. Functionality within OSI Model[編集]
DLC operates at the Data Link Layer, the second layer of the Open Systems Interconnection (OSI) model. This layer is responsible for node-to-node data transfer, error detection, and frame synchronization. DLC protocols ensure that data is packaged into frames and reliably transmitted across the physical network.
4. Protocols and Standards[編集]
DLC encompasses various protocols, each designed for specific network types and purposes. These include HDLC (High-Level Data Link Control), SDLC (Synchronous Data Link Control), and LLC (Logical Link Control). HDLC is widely used in both public and private networks, while SDLC is particularly associated with SNA environments.
5. Applications and Examples[編集]
DLC is employed in various network architectures besides SNA, including Local Area Networks (LANs) and Wide Area Networks (WANs). It ensures the smooth and accurate transmission of data across these networks, supporting a variety of applications ranging from simple file transfers to complex enterprise systems.
6. References[編集]
https://www.ibm.com/docs/en/aix/7.1?topic=concepts-data-link-control
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