Origin of OSI Model Essay Example for Free

ancestor of OSI Model EssayMuch of the work on the design of OSI was done by a multitude at Honeywell Information Systems, headed by Mike Canepa, with Charlie Bachman as the principal technical member. This group was organized at heart Honeywell, with advanced product planning and with the design and development of prototype systems. In the early and mid 1970s, the amour of Canepas group was mainly on database design and then distributed database design. By the mid-1970s, it become clear that to support database machines, distributed access, and the like, a structured distributed communications architecture would be needed. The group studied some of the existing solutions, including IBMs system net profit architecture (SNA), the work on protocols being done for ARPANET, and some of the concepts of presentation services being demonstrable for standardized database systems. The result of this effort was the development by 1977 of a seven-layer architecture known as the distr ibuted systems architecture (DSA). Bachman and Canepa participated in ANSI meetings and presented their seven-layer model. This model was chosen as the only proposal to be submitted to the ISO subcommittee.When the ISO group met in working capital DC in March of 78, the Honeywell team presented their solution. An agreement was reached at that meeting that this layered architecture would fit most requirements of OSI, and had the ability to be expanded later to meet new requirements. A provisional pas seul of the model was published in March of 78. The next version, with some minor adjustments, was published in June of 1979 and at long last standardized. The resulting OSI model is essentially the same as the DSA model developed in 1977.