w Describe the topologies used in wide area networks
w Explain the use of IBM’s System Network Architecture and how it relates to today’s communication environments
w Define System Application Architecture and how it is used in a wide area network
w Describe the use of Digital Network Architecture (DNA)
w Illustrate the differences among the layered architectures of SNA, SAA, DNA, and the OSI model
w Explain how electronic data interchange (EDI) uses wide area networks
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