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Code Division Multiple Access (CDMA)
-to improve the efficiency and quality of digital communications, it transmits multiple encoded messages over a wide frequency and then decodes them at the receiving end.
*Communication media
-(channels) connect sender and receiver devices. They can be conducted or radiated.
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Computer fraud
-the unauthorized use of computer data for personal gain.
*Computer literacy
-skill in using productivity software, such as word processors, spreadsheets, database management systems, and presentation software, as well as having a basic knowledge of hardware and software, the Internet, and
collaboration tools and technologies.
*
Computer-
a machine that accepts data as input, processes data without human intervention by using stored instructions, and outputs information.
*Conducted media
-provide a physical path along which signals are transmitted, including twisted pair copper cable, coaxial cable, and fiber optics
*Confidentiality-
a system must prevent disclosing information to anyone who is not authorized to access it.
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Control unit
-tells the computer what to do, such as instructing the computer which device to read or send output to.
*
Controller
-a hardware and software device that controls data transfer from a computer to a peripheral device (examples are a monitor, a printer, or a keyboard) and vice versa.
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Convergence
-refers to integrating voice, video, and data so that multimedia information can be used for decision making.
*Cookies
-small text files with unique ID tags that are embedded in a Web browser and saved on the user’s hard drive.
*
CPU case
-a computer chassis or tower. It is the enclosure containing the computer’s main components.
*Create, read, update, and delete (CRUD)
-refers to the range of functions that data administrators determine who has permission to perform certain functions.
*
Cybersquatting
-registering, selling, or using a domain name to profit from someone else’s trademark.
*
Data communication
-the electronic transfer of data from one location to another.
*
Data dictionary
-stores definitions, such as data types for fields, default values, and validation rules for data in each field.
*Data encryption-
transforms data, called plaintext or cleartext, into a scrambled form called ciphertext that cannot be read by others.
*Data
hierarchy
-the structure and organization of data, which involves fields, records, and files.
*
Data mart
-usually a smaller version of a data warehouse, used by a single department or function.
*
Data model
-determines how data is created, represented, organized, and maintained. It usually contains data structure, operations, and integrity rules.
*Data warehouse
-a collection of data from a variety of sources used to support decision making applications and generate business intelligence.
