| English | German |
| High-level Data Link Control | High-Level Data Link Control (A protocol for information transfer adopted by the ISO. HDLC is a bit-oriented, synchronous protocol that applies to the data-link (message-packaging) layer (layer 2 of the ISO/OSI reference model) for computer-to-microcomputer communications) |
| Link Control Protocol | Link Control-Protokoll (A PPP control protocol that negotiates link and PPP parameters to dynamically configure the data-link layer of a PPP connection) |
| logical link control and adaptation protocol | Logical Link Control and Adaptation-Protokoll (A protocol used in personal wireless network applications that provides connection-oriented and connectionless data services to upper layer protocols with protocol multiplexing capability, segmentation and reassembly operation, and group abstractions) |