A computer running Windows NT can communicate with IBM SNA hosts (as well as other network devices) across an Ethernet or token ring LAN through the Data Link Control (DLC) protocol that is built into Windows NT. The DLC protocol device driver enables a basic level of connectivity with other computers running the DLC protocol stack. For example, a Windows NT computer can connect to and communicate with an IBM mainframe through its 37x5 Front-end processor (FEP) using a 3270 terminal emulator and the DLC protocol. See Chapter 7, "Using DLC with Windows NT," for more information.