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[EXAM• STUDY GUIDE • SUMMARY • ASSIGNMENT]
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,Information Technology The technology used in creating, maintaining, and making information accessible.
IT Professional Roles Administration and Support
System Administrator Maintains all aspects of the system including hardware, software, and programming.
Network Administrator In charge of all aspects of the computer network
Database Administrator Focuses on the design, development, and support of database management systems
(DBMSs).
Security Administrator Installs, configures, and administers firewall security to protect systems and proactively
work to stop intrusions.
Web Administrator Installs, configures, maintains, secures, and troubleshoots web severs.
Support IT Professionals Help desk and training.
Information Processed data.
DIKW Hierarchy Defines the transition of data to information from knowledge to wisdom. (Data
Information Knowledge Wisdom)
Data in DIKW The input directly received by the user (or computer). It is generally not usable until it has
been converted into a relevant form.
Information in DIKW Having been inferred from data; one or more processes have been applied to the data to
transform it into a more useful form.
Knowledge in DIKW Information that has been put to use; information placed into a context. Refined
information such that the user of the knowledge is able to call forth only relevant
portions of information when needed.
Wisdom in DIKW Provides a social setting to knowledge; an understanding of the "why". Can only come by
having both knowledge and experience.
, Information Systems A collection of data and information used to support the management of an organization.
Also refers to the technical components and human resources that enable the assembly,
storage, and processing of data and the delivery of information. This has existed for a lot
longer than computers.
Characteristics of Quality Data Relevance - the data being used must apply directly to the decision being made
Timely - data must be efficient and must be provided in a timely manner
Thorough - the data must be complete
Accurate - data should be captured only once, where possible and should be captured
as close to the point of activity as possible.
Reliable - data should reflect stable and consistent data collection processes across
collections points and over time
IPOS The Input-Procession-Output-Storage Cycle
Input Raw data is entered by the user.
Processing Raw data is organized or structured for usefulness.
Output Information is output so user can see results.
Storage Processed information is stored for permanent record.
Computer System A collection of components that work together to meet the needs of the user; typically
categorized as either hardware, software, networks, or users.
Hardware Physical components of a computer system which include the system unit and its
components and peripheral devices; tangible aspects of the computer.
Software Computer programs that tell the computer what to do--how to execute commands and
process information
Network A collection of computers and resources connected by various media so that they can
communicate with each other.