MIS Exam #2.docx

MIS Exam #2.docx - Chapter 5 IT Infrastructure Hardware and...

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Chapter 5 - IT Infrastructure: Hardware and Software 1. Key infrastructure components Data Management, Hardware, Networking, Software, & Services, 2. Client Server and n-tier architecture In client/server computing, computer processing is split between client machines and server machines linked by a network. Users interface with the client machines. In a multitiered client/server network, client requests for service are handled by different levels of servers. 3. IT consumerization New technology that emerges in consumer market spreads into business organizations BYOD (bring your own device): business use of personal mobile devices 4. Virtualization Process of presenting a set of computing resources so they can be accessed in ways that are unrestricted by physical configuration or geographic location. Enables single physical resource to appear to the user as multiple resources. Enables companies to host multiple systems on single machine 5. Cloud computing A model of computing in which firms and individuals obtain computing resources over the Internet Cloud infrastructure as a service (IaaS), Cloud platform as a service(PaaS), Cloud software as a service (SaaS) Public vs. private clouds Utility computing/on-demand computing--only paying for additional computing power as needed Data storage security is in hands of provider 6. Green computing Practices and technologies for designing, making, using, and disposing of computer hardware to reduce environmental impact. Key priority is power reduction 7. Hardware Trends Includes the mobile digital platform: Mobile devices, smartphone, Netbooks and tablet computers, E-book readers along with the Consumerization of IT, Nanotechnology & quantum computers, green computing, cloud computing, performance/power-saving processors, virtualization 8. Types of software a. System software software—consisting of operating systems, language translators, and utility programs—controls access to the hardware b. Application software including programming languages and “fourth-generation” languages, must work through the system software to operate 9. Software trends A. Open source software a. Provides all computer users free access to its program code, can modify code to fix errors or make improvements, not owned by anyone--Linux, Apache
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B. Cloud-based software and tools a. SaaS (software as a service) & Google Docs b. Mashups--Zip Realty uses Google Maps and Zillow.com c. Apps--Mobile apps 10. Aspects of managing hardware and software a. Capacity planning & scalability (CP) is process of predicting when hardware system becomes saturated Ensuring firm has enough computing power for current and future needs Factors include: Maximum number of users, Impact of current, future software, & Performance measures (S) is ability of system to expand to serve large number of users without breaking down b. Total Cost of ownership(TCO) model Used to analyze direct and indirect costs to help determine the actual cost of owning a specific technology Direct costs: hardware, software purchase costs
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