The goals of the protocols (TCP/IP and SNA) were different. TCP/IP was developed to provide collaboration between computers and data sharing. SNA was developed for central control.
In the 1980s, TCP/IP was used extensively by scientists who wanted to share research papers and ideas stored on their campus computers with academic staff around the world. IBM designed SNA for business data processing applications. The hierarchical topology of SNA matches the organizational structure of
businesses and enterprises. The most common example is a bank where the tellers in the branch require access to the bank's central database. The same paradigm is also true for the insurance and retail industry. Also, businesses that have regional offices connected to a corporate site can implement the hierarchical network model.
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