Chapter 5.doc
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Department
Information Technology Management
Course
ITM 102
Professor
Vikraman Baskaran
Semester
Winter

Description
Chapter 5 IT Infrastructure and Emerging Technologies IT infrastructure includes investment in hardware software and services such as consulting education and training that are shared across the entire firm or across entire business units in the firmConsists of a set of physical devicesandsoftware applications that are required to operate the entire enterprise 5 stages in evolution are general purpose mainframe and minicomputer computing personal computers clientserver networks enterpriseInternet computing and cloud computing The 360 was the first commercial computer with a powerful operating system that could provide timesharing multitasking and virtual memory Minicomputers produced by Digital Equipment Corporation in 1965Wintel PC computer became the standard desktop personal computer In client server computing desktop or laptop computers called clients are networked to powerful server computers that provide the server with a variety of services and capabilitiesThe client is user point of entry server processes and stores shared dataThe simplest clientserver network consists of a client computer networked to a server computer with processing split between the two types of machines Two tiered clientserer architectureMost corporations have multitiered organizationscalled NtierWeb server will serve aweb page to a client in response to a request for a serviceApplication server software handles all application operations between a user and an organizations backend business systemsMicrosoft is market leader with windows operating systems Cloud computing refers to a model of computing in which firms and individuals obtain computing power and software applications over the internet rather than purchasing their own hardware and software Moores law and microprocessing power cofounder of intel corporationleading computer chip manufacturer wrote in the electronics magazine that since the first microprocessor chip was introduced in 1959 the number of components on a chip with the smallest manufacturing costs per component had doubled each year
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