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CIS chp 5 notes
Terms in this set (52)
A large expensive, powerful computer that can handle hundreds or thousands of connected users simultaneously.
This is a computer system that is smaller and less expensive than a mainframe, but still can be used by many users. Larger businesses use them.
Windows operating system software on a computer with an Intel microprocessor
desktop or laptop computers called clients are networked to powerful server computers that provide the client computers with a variety of services and capabilities
Multitiered (N-tier) client/server architecture
the work of the entire network is balanced over several different levels of servers, depending on the kind of service being requested
Server a web page to a client in response to a request for service. Is responsible for locating and managing stored web pages
handles all application operations between a user and an organization's back-end business systems
Refers to a model of computing that provides access to a shared pool of computing resources over a network
1. The power of microprocessors doubles every 18 months
2. Computing power doubles every 18 months
3. The price of computing falls by half every 18 months
uses individual atoms and molecules to create computer chips and other devices that are thousands of times smaller than current technologies permit
Law of Mass Digital Storage
The amount of digital information is roughly doubling every year
specifications that establish the compatibility of products and the ability to communicate in a network
computers consisting of a circuit board with processors, memory, and network connections that are stored in racks
UNIX and Linux
Scalable reliable and much less expensive than mainframe operating systems
software that manages the resources and activities of the computer
A lightweight operating system for cloud computing using netbooks
open source operating system for mobile devices Google and the Open Handset Alliance developed; currently the most popular smartphone operating system worldwide
The operating system used on the iPhone, iPod Touch, and iPad.
Where users employ one or more fingers to manipulate objects on a screen without a mouse or keyboard
Runs on tablets as well as PCs, has a user interface optimized for touch but also works with a mouse and keyboard.
Storage Area Network (SAN)
connect multiple storage devices on a separate high-speed network dedicated to storage
Web hosting service
maintains a large Web server, or series of servers, and provides fee-paying subscribers with space to maintain their Web sites.
generally older transaction processing systems created for mainframe computers that continue to be used to avoid the high cost of replacing or redesigning them
Small, lightweight netbooks optimized for wireless communication and internet access
Consumerization of IT
new information technology that first emerges in the consumer market spreads into business organizations
uses the principles of quantum physics to represent data and perform operations on these data
Process of presenting a set of computing resources so they can be accessed in ways that are unrestricted by physical configuration or geographic location
A model of computing in which computer processing storage software and other services are provided as a pool of virtualized resources over a network
The US national institute of standards and technology defines cloud computing as having the following essential characteristics
-on demand self service
-ubiquitous network access
-location independent resource pooling
Cloud computing consists of three different types of services
-infrastructure as a service
-platform as a service
-software as a service
owned and maintained by a cloud service provider and made available to the general public or industry group
operated solely for an organization
On demand computing
Firms off-loading peak demand for computing power to remote, large-scale data processing centers, investing just enough to handle average processing loads and paying for only as much additional computing power as they need. Also called utility computing.
Computing model where firms use both their own IT infrastructure and also public cloud computing services.
Green Computing (Green IT)
Refers to practices and technologies for designing, manufacturing, using, and disposing of computers, servers, and associated devices such as monitors, printers, storage devices, and networking and communications systems to minimize impact on the environment.
Integrated circuit to which two or more processors have been attached for enhanced performance, reduced power consumption and more efficient simultaneous processing of multiple tasks.
open source software
Software that provides free access to its program code, allowing users to modify the program code to make improvements or fix errors.
Programming language that can deliver only the software functionality needed for a particular task, such as a small applet downloaded from a network; can run on any computer and operating system.
An easy-to-use software tool for accessing the World Wide Web and the Internet.
HTML (Hypertext Markup Language)
page description language for creating web pages
Next evolution of HTML, which will make it possible to embed images, video,and audio directly into a document without add-on software.
Set of universal standards using Internet technology for integrating different applications from different sources without time-consuming custom coding. Used for linking systems of different organizations or for linking disparate systems within the same organization.
XML (Extensible Markup Language)
General purpose language that describes the structure of a document and XML can perform presentation, communication, and storage of data, allowing data to be manipulated by the computer
A prewritten, precoded, commercially available set of programs that eliminates the need to write software programs for certain functions.
Service-oriented architecture (SOA)
Software architecture of a firm built on a collection of software programs that communicate with each other to perform assigned tasks to create a working software application
The practice of contracting computer center operations, telecommunications networks, or applications development to external vendors
Software as a Service (SaaS)
Service Level Agreement (SLA)
formal contract between customers and their service providers that defines the specific responsibilities of the service provider and the level of service expected by the customer
composite software applications that depend on high-speed networks, universal communication standards, and open source code and are intended to be greater than the sum of their parts
Small pieces of software that run on the Internet, on your computer, or on your cell phone and are generally delivered over the Internet.
The ability of a computer, product, or system to expand to service a larger number of users without breaking down
Total Cost of Ownership (TCO)
Designates the total cost of owning technology resources, including initial purchase costs, the cost of hardware and software upgrades, maintenance, technical support, and training.
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