Chapter 5.docx

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Ryerson University
Information Technology Management
ITM 102
Franklyn Prescod

Chapter 5 5.1 IT Infrastructure It infrastructure: Set of physical devices and software required to operate the enterprise. -Shared technology resources that provide the platform for the firm’s specific information system applications. Includes investments in hardware, software, and services such as consulting, education and training. -Diagram on page 141,144, -Technology Drivers of Infrastructure: Moore’s Law and micro processing power: the doubling of processing unit of computer power in 18 months or more. This will make it more affordable and make the computer more efficient. The price of computing falls by half every 18 months. The Law of Mass Digital Storage: The amount of digital information is roughly doubling every year. The cost of storage is falling at an exponential rate of 100 percent every year. Metcalfe’s Law and Network Economics: The value of a network grows exponentially as a function of the number of network members 5.2 Computer Hardware Platforms: Client machines (desktops, laptops and PDAs). Mainframes systems used as giant servers for enterprise networks and corporate web sites. Operating System Platforms: Microsoft Windows dominates the market of client machine software. Unix or Linux widely used as server software. Linux is available as open-source software. Job is to a specialized type of software used to manage the computing and users environment. Enterprise Software Applications: allows data to be used by multiple functions and business processes. Data management and storage: Responsible for organizing and managing the firm’s data so that they can be efficiently accessed and used. Networking/Telecommunications Platforms: Leading network hardware providers are Cisco, Lucent, Nortel, and Juniper, Software leaders are Microsoft, Novell, Linux, and Unix, Service vendors include Bell Canada, Primus, and regional carriers, Growth of wireless and Voice over IP (VoIP). Internet Platforms: Hardware, software, management services to support company web sites, intranets, extranets. Consulting and System Integration Services: Large firms do not have resources for full range of support for new, complex infrastructure. Software integration is ensuring new infrastructure works with legacy systems. Legacy systems are older TPS created for mainframes that would be too costly to replace or redesign. Legacy system can also refer to any older system no matter what infrastructure it uses, replacing older systems can be cost-prohibitive and most often unnecessary if the systems can be integrated into a contemporary infrastructure. 5.3 The emerging mobile digital platform: Cell phones, smartphones have assumed data transmission, web surfing, email and IM duties. Netbooks: small, low-cost lightweight notebooks optimized for wireless communication and core computing tasks. Grid Computing: involves connection geographically remote computers into a single network capable of working in parallel on business problems that requires short- term access to large computational capacity. Virtualization: presents a set of computing resources (such as computing power or data storage) so that they can all be accessed in ways that are not restricted by physical configuration or geographic location. Cloud Computing: enables firms and individuals to obtain computer processing, storage, software and other services as a pool of virtualized resources over a network, primarily the internet. Three branches: Software as a service, Infrastructure as a service and Platform as a service. They are either Public or Private. Green Computing: Practices and technologies for manufacturing, using, disposing of computing and networking hardware High- Performance and Power-Saving Processors: Multi core processors. Autonomic Computing: Industry-wide effort to develop systems that can configure, heal themselves when broken, and protect themselves from outside intruders, Similar to self-updating antivirus software; Apple and Microsoft both use automatic updates. 5.4 Linux and Open Sources Software: is free and can be modified by users. Developed and maintained by a worldwide network of programmers and designers under the management of user communities. Linux is the most widely used
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