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Glossary of Technical Terms
TB ( terabyte ) is a unit of digital information storage equal to 1 trillion (10
12
) bytes, or 1,000
gigabytes.
TCP/IP ( Transmission Control Protocol/Internet Protocol ) is the set of standards governing data
transmission over the Internet.
TCP/IP content fi ltering blocks communication on the basis of where packets of data are going
to or coming from, and not on what they contain.
TCP/IP header fi ltering blocks communication on the basis of the IP address and/or the port
number (which gives clues as to the type of Web service being accessed) contained in the header
of the data packet being sent.
Top-level domain is the group of letters (usually two or three, but can include more) that follow
the fi nal dot in a domain name. Example: in opennet.net, the top-level domain is .net.
URL ( Uniform Resource Locator ) is a string of characters that specify where a particular resource
is located online and how to retrieve it. Also known as a Web address.
User ID ( User Identifi cation ) is a unique string of characters that identifi es users of passwordprotected online services, such as e-mail or social networking sites.
VCD ( Video Compact Disc ) is a digital compression standard that enables the storage of video
on a compact disc.
VoIP ( Voice over Internet Protocol ) is a technology that allows for voice communication over the
Internet.
WAP ( Wireless Application Protocol ) is a global standard for the transfer of information without
using electrical conduits (wires). It allows for access to the Internet using mobile devices.
Warez (derived from the plural of ‘ ‘ ware, ’ ’ as in software) refers to copyrighted material that is
distributed in violation of copyright law.
WiMAX ( Worldwide Interoperability for Microwave Access ) is a wireless digital communications
system that is meant to provide fi xed and mobile Internet access for metropolitan area
networks.
Glossary of Technical Terms
TB ( terabyte ) is a unit of digital information storage equal to 1 trillion (10
12
) bytes, or 1,000
gigabytes.
TCP/IP ( Transmission Control Protocol/Internet Protocol ) is the set of standards governing data
transmission over the Internet.
TCP/IP content fi ltering blocks communication on the basis of where packets of data are going
to or coming from, and not on what they contain.
TCP/IP header fi ltering blocks communication on the basis of the IP address and/or the port
number (which gives clues as to the type of Web service being accessed) contained in the header
of the data packet being sent.
Top-level domain is the group of letters (usually two or three, but can include more) that follow
the fi nal dot in a domain name. Example: in opennet.net, the top-level domain is .net.
URL ( Uniform Resource Locator ) is a string of characters that specify where a particular resource
is located online and how to retrieve it. Also known as a Web address.
User ID ( User Identifi cation ) is a unique string of characters that identifi es users of passwordprotected online services, such as e-mail or social networking sites.
VCD ( Video Compact Disc ) is a digital compression standard that enables the storage of video
on a compact disc.
VoIP ( Voice over Internet Protocol ) is a technology that allows for voice communication over the
Internet.
WAP ( Wireless Application Protocol ) is a global standard for the transfer of information without
using electrical conduits (wires). It allows for access to the Internet using mobile devices.
Warez (derived from the plural of ‘ ‘ ware, ’ ’ as in software) refers to copyrighted material that is
distributed in violation of copyright law.
WiMAX ( Worldwide Interoperability for Microwave Access ) is a wireless digital communications
system that is meant to provide fi xed and mobile Internet access for metropolitan area
networks.