| Subject | English | Chinese |
| IT | data link control protocol | 数据链路控制协议 |
| IT | high -level data link control protocol | 高级数据链路控制规程 (HDLC protocol) |
| tech. | high-level data link control protocol | 高级数据链路控制规程 |
| IT | synchronous data link control protocol | SDLC 协议 (SDLC protocol) |
| agric. | synchronous data link control protocol | 同步数据链路控制协议 (SDLC protocol) |
| IT | universal data link control UDLC protocol | 通用数据链路控制规程 |