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shared technology resources that provide the platform for a firm's information system applications; it consists of physical devices and software applications that are required to operate the entire enterprise
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examples of IT infrastructure start learning
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computing platforms; telecommunications services; data management services; application software services; IT management; IT education
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evolution of IT infrastructure start learning
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1. General Purpose Mainframe and Minicomputer 1959; 2. Personal Computer 1981; 3. Client/Server 1983; 4. Enterprise Computing 1992; 5. Cloud and Mobile Computer 2000
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Components of IT infrastructure start learning
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computer hardware platforms; operating system platforms; enterprise software applications; data management and storage; networking telecommunications platforms; internet platforms; consulting and system integration services
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mobile digital platform; consumerizartion of IT and BYOD; quantum computing; virtualization; cloud computing; edge computing; green computing; high performance processors
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bring your own device; allowing employees to use their own devises at a workplace
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two or more connected computers
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network operating system (NOS) start learning
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manages communications on the network and coordinates network resources
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software-defined networking (SDN) start learning
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networking approach, in which many of these control functions are managed by one central program; helpful in cloud computing environment
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Key Digital Networking Technologies start learning
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Client/server computing; Packet Switching; TCP/IP and Connectivity
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technology drivers of IT infrastructure evolution start learning
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Moore's law and microprocessing power; Law of Mass Digital Storage; Metcalfe's Law and network economics
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Moore's Law and microprocessing power start learning
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computing power doubles every 2 years; nanotechnology - uses individual atoms and molecules to create computer chips that are thousands of times smaller than currently technologically possible; Moore's law means decreasing costs
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Law of Mass Digital Storage start learning
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the amount of data being stored each year doubles; the cost of storing digital information is falling exponentially
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Metcalfe's Law and network economics start learning
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value of power of a network grows exponentially as a function of the number of network members; increasing returns to scale
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Quantum computing; DNA (molecular); optical computers
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uses quantum physics to represent and operate on data; can process units of data as 0,1 or both; dramatic increases in computing speed
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emerging branch of computing that uses DNA, biochemistry and molecular biology hardware
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computer that use light particles called photons
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vision of IT resources over the internet; servers are provisioned over the internet on-demand, not on-premise as usual; software is assessed as a web service through a browser, not downloaded as usual from the Internet
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advantages of cloud computing start learning
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reduces upfront costs; increases flexibility for scaling
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disadvantages of cloud computing start learning
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may lead to higher long-term costs; dependence on providers; moving legacy systems to cloud may be costly
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Infrastructure-as-a-service (Iaas) start learning
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allows users to instantly obtain or give up IT hardware resources such as company storage and networking capabilities; offers the most customisation
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Platform-as-a-service (Paas) start learning
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allows users to work within a complete development and deployment environment over the internet; provides development and intelligence tools that help to quickly create new applications and analyse usage data
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Software-as-a-service (Saas) start learning
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allows users to connect to and use cloud-based apps over the internet; for example email, office tools, calendars, mobile apps, corporate software tools CRM and ERP
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decentralised system of networks that links devices around the globe and enables data transmission among them
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common application transfer protocols start learning
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Hypertext transfer protocol; used for communication between web browsers and web servers
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simple mail transfer protocol; for email transmission
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file transfer protocol; for file transfers between clients and servers
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uniform resource locator; is used to find resources on the Internet; HTML - Hypertext Markup Language is a standard language to format websites
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are assigned to every device connected to the Internet; 32-bit number
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Domain name system; the phone book of the Internet; DNS converts IP addresses to domain names
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Transmission Control and internet protocol; enable data transfer across the Internet; TCP slices data that is to be set into packets at the source computer; IP routes packets to the computer; TCP at the computer checks for completeness, reassemble packets
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all internet traffic should be treated equally, no preferential treatment toward any users by the Internet Service Providers
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Evolution of mobile technologies start learning
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1980 - 1G (analog voice transmission), 1990 - 2G (digital transmission), 2000 - 3G, bust of the dot-com bubble, 2007 - smartphone era, 2010 - 4G, 2020 - 5G, IoT era
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