COMM 226 Lecture Notes - Lecture 4: Remote Job Entry, Grid Computing, Information Technology Management
15 Mar 2018
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Document Summary
Evolution of it infrastructure: stand-alone mainframes: organizations initially used mainframe computers in their engineering and accounting departments. The mainframe was typically housed in a secure area, and only mis personnel had accessed to it: mainframe and dumb terminals: implemented electronic typewriters with limited processing power in user departments. Allowed users to input computer programs into the mainframe from their departments (remote job entry): stand-alone personal computers: first personal computers. Local area networks (client/server computing): lans: enterprise computing: different kinds of networks throughout the firm (personal computers, smart phones, printers), cloud computing and mobile computing: access to a shared pool of computing resources. On-premise computing: a model of it management where companies own their it infrastructure (software, hardware, networks and data management) and maintain it in their data centres. Cloud computing provides on-demand self-service: can be accessed automatically (elasticity and flexibility, customers can increase (scale up) or decrease (scale down) the amount of computing they need.
