Also, the synchronous data link control (SDLC) pro-tocol and the remote communication access method VTAM are introduced.
本文还简要地介绍了同步数据键路控制(SDLC)规程以及远程通信访问法VTAM。
英语百科
Data Link Control
In the OSI networking model, Data Link Control (DLC) is the service provided by the data link layer. Network interface cards have a DLC address that identifies each card; for instance, Ethernet and other types of cards have a 48-bit MAC address built into the cards' firmware when they are manufactured.