DECnet from Digital Equipment Corporation is a suite of protocols which may be used on large networks that integrate mainframe and minicomputer systems. It is a routable protocol. DNA - Digital Network Architecture.
Data Link Control (DLC)
This protocol operates at the data link layer and is designed for communications between Hewlett-Packard network printers and IBM mainframe computers. This protocol is not routable.
Open Systems Interconnect (OSI)
A suite of protocols developed by the International Standards Organization (ISO) which corresponds with the layers of the OSI model. These protocols provide a number of application protocols for various functions. The OSI protocol stack may be used to connect large systems. OSI is a routable transport protocol.