Internet Glossary
Unfamiliar or unclear about a term or concept related to Web hosting services or Domain registration? This glossary gives meaning to much of the commonly used vocabulary associated with Web Hosting and the Internet. Simply click on any alphabetical category to quickly find the word you're looking for.
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T1
Dedicated telecommunications line providing 1.5 Mbps of bandwidth, Consists of 24 individual channels 64 Kbps each, that can be configured for voice or data transmission. T1 lines can be leased by businesses that required a dedicated Net connection of with higher reliability than a DSL and faster than an ISDN line but are still quite expensive
T3
Dedicated telecommunications line providing 44 Mbps of bandwidth, T3 lines are often used by ISPs to connect to the Internet backbone
TA / Terminal Adapter
A device used to attach a computer to an ISDN line -- in effect, an ISDN modem.
Tag
One of the defining elements of the HTML mark-up language in which Web pages are written. Tags, which are simple text expressions such as <FONT> or <B>, are used to describe how an element of a Web page should look or behave.
Talk / Internet Talk
A program for allowing synchronous, real-time communication (typed on screen) between two people on Internet computers. This requires a Talk client program and a connection to server software on the other user's computer.
T-Carrier
A digital telecommunications system developed by Bell Labs in the 1960s. The most commonly used types of T-carrier connection are T1 and T3 line. T1 lines, which typically carry data at 1.5Mbps (although speeds of 2Mbps are possible), are commonly used by ISPS to supply corporate bandwidth; 45Mbps T3 lines are also in widespread use.
TCl
Tool command language; Simple scripting language and library often used for GUI, string-manipulation, testing, and integration of multiple components
TCP / Transmission Control Protocol
TCP is a method used along with the Internet Protocol to send data in the form of message units between computers over the Internet.
TCP/IP
Protocols which enable different networks to work together on the Internet in such functions as file transfers, remote logins and e-mail. It is useful to think of TCP/IP as a kind of electronic removals outfit, which is used to ship data from one physical place to another.
TDM / Time Division Multiplexing
TDM systems offer a synchronous transmission of data over a fixed bandwidth channel. The most popular TDM transports are a T1 transport and a T3 transport. This transmission medium is ideal for traffic requiring a CBR transport, such as voice.
Telnet
An emulation protocol which enables users to logon to a remote system over a network
Terabyte
1024 gigabytes
Terminal
A device that allows you to send commands to a computer somewhere else, At a minimum, this usually means a keyboard and a display screen and some simple circuitry. Usually you will use terminal software in a personal computer - the software pretends to be (emulates) a physical terminal and allows you to type commands to a computer somewhere else
Terminal Server
A special purpose computer that has places to plug in many modems on one side, and a connection to a LAN or host machine on the other side, Thus the terminal server does the work of answering the calls and passes the connections on to the appropriate node . Most terminal servers can provide PPP or SLIP services if connected to the Internet
Thin Client
A stripped-down information appliance used to communicate with a central information source, often used as a synonym for network computer.
Third-level domain
Domain names are composed of at least two levels, a top-level domain and a second-level domain. The top-level domain, also referred to as TLD, is the suffix or extension attached to Internet domain names. There are a limited number of predefined TLDs, such as .com, Net and .org. A second-level domain (SLD) is the portion of a Uniform Resource Locator (URL) that identifies the specific and unique administrative owner associated with an Internet Protocol address (IP address). The second-level domain name includes the top-level domain name
Thread
The trail of responses to a message posted in a newsgroup or other electronic forum.
Thumbnail
A small version of a larger image
TIA
Telecommunications Industry Association, Another telecommunications standards organization
TIFF / Tagged Image File Format
A graphics or image file format developed by Aldus Corporation. TIFF is a standard image format for many graphics programs, and TIFF files can be delivered on the Internet. TIFF files have the file extension .tif or tiff.
TLA / Three Letter Acronym
A tribute to the use of acronyms in the computer field
TLD / Top Level Domain
A Top Level Domain (TLD) is the uppermost in the hierarchy of domain names. For example, communitech.net is our domain name. The "net" is considered the TLD and the "communitech.net" is considered the second level domain. Together they form a domain name which is unique. There are two types of TLDs. The most common type is the Generic or Global TLDs which include .COM, .NET, .ORG, .MIL, .INT and .EDU. There is a possibility that new gTLDs will be introduced in the near future. National or ccTLDs are two letter country code domains that are managed by a registry designated and controlled by each specific country. Each registry might have differing prices, residency requirements and structure .
Token bus
A Medium Access Control (MAC) technique for a bus/tree configuration, The stations are connected to the bus and a token is passed on the bus. A station receiving the token may transmit data and then pass the token on to the next station.
Token ring
A Medium Access Control (MAC) technique for rings, A token circulates around the ring being sent from station to station. By receiving the token, a station may transmit. Transmission consists in inserting a packet on the ring, and appending the token to the packet.
Trace route
A computer program that lists network hosts visited by a packed on the way to its destination, Very useful for network debugging
Trademark (Domain Name)
As it relates to domain names... a word, phrase or slogan used to identify and distinguish the source of the goods or services. Trademark law may be different worldwide. If someone registers a domain name such as microsoft.to then Microsoft would need to go to the courts in Tonga to fight to get the name back. Expensive international litigation is one reason why it is important to protect your trademarks before someone else registers the names
Traffic
Data packets being transmitted over a network
Transaction Fee
A transaction Fee is a charge for each credit card transaction, collected by the merchant account provider or ISO. Transaction fees usually fall between $0.20 and $1.00
Transfer (Domain Name)
On occasion, domains are sold to another organization or sometimes the name of a company might change. Most registries require a letter of permission from the old owner to hand over control to the new owner. The procedures for Transfer of ownership will depend on the registry
TTP / Trusted Third Party
An organization entrusted with the keeping of cryptographic keys. The apparent idea behind the appointment of trusted third parties (TTPS) is that by holding a copy of someone's public key they can provide independent confirmation of that person's identity to other parties in an E-commerce deal.
Tunneling
A technique used to create private networks on the public systems of the Internet.
Turnkey Application Turn-Key
Turnkey Application Turn-Key computer software which requires little or no modification when inserted into a web site, In e-commerce, many merchant account providers and ISOs offer turnkey applications for processing credit card orders online
Twisted Pair
The pair of copper wires that connect most people to the Internet. Despite the invention of many newer and glitzier ways of transmitting data between two points, copper wire remains the cheapest and most convenient to use because it is installed in so many homes as part of the ordinary telephone system
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