Open Systems Interconnection
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Prior to OSI, networking was largely either government-sponsored (ARPANET in the US, CYCLADES in France) or vendor-developed and proprietary standards (such as the System network architecture (SNA) of IBM and DECnet of Digital Equipment Corporation). A Experimental Packet Switched system in the UK circa 1973,
The OSI protocol suite that was specified as part of the project was considered by many, such as computer scientist Andrew S. Tanenbaum, to be too complicated and inefficient, and to a large extent unimplementable. Taking the "forklift upgrade" approach to networking, it specified eliminating all existing protocols and replacing them with new ones at all layers of the stack. This made implementation difficult, and was resisted by many vendors and users with significant investments in other network technologies. In addition, the protocols included so many optional features that many vendors' implementations were not interoperable.
Although the OSI model is often still referred to, the Internet's TCP/IP protocol suite is used in lieu of the OSI protocols. TCP/IP's pragmatic approach to computer networking and two independent implementations of simplified protocols made it a practical standard. Some protocols and specifications in the OSI stack remain in use, one example being IS-IS, which was specified for OSI as ISO/IEC 10589:2002 and adapted for Internet use (with TCP/IP) as RFC 1142.
- OSI model
- OSI protocols
- Common Management Information Service (CMIS)
- GOSIP, the (U.S.) Government Open Systems Interconnection Profile
- Hubert Zimmermann (April 1980). IEEE Transactions on Communications 28 (28): 425–432. doi:10.1109/TCOM.1980.1094702. Missing or empty
- Andrew S. Tanenbaum, Computer Networks, § 1.4.4.
- John Day, "Patterns in Network Architecture: A Return to Fundamentals" (Prentice Hall 2007, ISBN 978-0-13-225242-3)
- Marshall Rose, The Open Book (Prentice-Hall, Englewood Cliffs, 1990)
- David M. Piscitello, A. Lyman Chapin, Open Systems Networking (Addison-Wesley, Reading, 1993)
- Andrew S. Tanenbaum, Computer Networks, 4th Edition, (Prentice-Hall, 2002) ISBN 0-13-066102-3
- Gary Dickson; Alan Lloyd (July 1992). Open Systems Interconnection/Computer Communications Standards and Gossip Explained. Prentice-Hall. ISBN 978-0136401117.
- ISO/IEC 7498-1:1994, Information technology—Open Systems Interconnection—Basic Reference Model: The Basic Model
- ITU-T Recommendation X.200 (11/93) [ISO/IEC 7498-1:1994], Open Systems Interconnection - Basic Reference Model.
- Open System Interconnection