The Techie Glossary
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Letter
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A B C D E F G H I J K L M N O P Q R S T U V W X Y Z |
2nd |
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T    |
T1
connections are
dedicated broadband connections to
the Internet available over leased
lines that produce much faster speeds than DSL.
A full T1 connection is approximately equal to 28 phone lines transferring
data at around 1.45 MBPS.
T3
connections
are broadband connections to the Internet
available over high speed leased lines that produce faster speeds than
a T1 connection. It can transfer data
at a rate of approximately 44.74 MBPS.
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Ta |
Tab
key
refers to a key on the keyboard that has
the word Tab or just an arrow pointing to the right on it. It provides
various functions with different operating
systems and software applications.
In word processing software the Tab key
usually inserts a tab space into the document. For other programs
in a GUI operating
system the Tab key and the shift+tab combination is the method used
to jump between input options using the
keyboard. Tags
refer to angle brackets in HTML that define
the HTML document. These text tags include
HTML elements and their HTML
attributes. HTML tags are generally used by surrounding the text or
object to be affected. Tape
drives
are secondary storage devices used for
back up purposes. They operate using removable
magnetic tapes usually on interchangeable cassettes for containing the
stored data. Task
managers
are utility software
that tells the user what tasks the processor
is currently running or what tasks are having problems responding to the
system. This manager can be brought up in some operating
systems with the control-alt-delete
key combination. Tasks
are the processes run by the operating
system. A utility software
called a task manager tells the user
what tasks are running and what tasks are having problems responding to
the system.
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TC
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TCP
stands
for Transmission Control Protocol. This suite of network
protocols defined by RFCs
can connect all types of computer platforms.
It is part of the popular TCP/IP suite
used on many networks and which is the core of networking communications
on the Internet. In TCP/IP each device
connected to the network has an IP address
and uses the TCP protocols to communicate. TCP works on the transport
layer and presentation layer of the
OSI network model. TCP/IP
stands
for Transmission Control Protocol and Internet Protocol. This group of
protocol standards defined by RFCs is a suite
of network protocols
which can connect all types of computer
platforms. This suite of protocols is used on many networks and is the
core of networking communications on the Internet.
It is a necessary to install this set of protocols on a computer
system to connect it to the Internet. With TCP/IP each device connected
to the network uses IP to establish an IP
address and uses the TCP to transport
data to communicate. TCP/IP works on several
layers of the OSI
network model.
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Te |
Telecommunication
is all transmission and reception of data
whether video, audio, or other communications through any electromagnetic
system. Telecommuting
is the use of a telecommunications system
to connect through a network to go to work
from a remote site instead of driving to
a centralized location. Usually this is done through a home computer.
Telnet
is a method of communicating between two computer
systems. The user starts a Telnet utility
as a client application to login
to a server that provides a Telnet service.
The service gives the user a command line
interface to login to the server
computer as a user. In Telnet the username
and password are unencrypted
which can be a security risk. SSH
is a service that provides the same type of command line interface, but
with secure encrypted communications.
Terabyte
is a
unit of measurement in computer memory
that is exactly equal to 1,099,511,627,776 bytes,
just over one trillion bytes. A terabyte is equal to exactly 1024 gigabytes,
which is 2 to the power of ten. Terminal
has
different meanings depending on the context, but on a network
it is a computer system or end
system. In most cases the usage of the word terminal means the system
on the network is a thin client that has
no local hard
drive. These types of terminals are usually just input/output
stations consisting of keyboard, mouse
and monitor for video
display used on networks with multi-user
systems. It then allows the user access to server-side
network applications usually through a
command line interface.
Terminal
emulation
is the use of a utility program
that allows communications with another computer
system on a network as if the user
was on the terminal itself. Terminal
interface
refers to the command line interface
when accessed from a terminal computer
system on a network. Terminating
is shutting down a process of a software
application, operating system or
service. This procedure can be done by
using the file menu and choosing to exit
or quit the application. Sometimes clicking
on an x on the menu bar of the window will
exit the application. Typing the word exit or quit will usually stop processes
on the command line. There are other
ways to terminate running process such as with a task
manager or using a kill command. Exiting
applications usually terminates all processes
and services connected with it. Exiting or quitting is the proper way
to terminate an application. Text
editors
are software applications that can create
text files and save
them standard ASCII text format or rich
text format. Text
files are
files consisting of viewable text characters
that can be created by text editors. The two basic
formats are the rich text format and the
ASCII format. BINHEX
is a utility for converting non-text binary
files into text files.
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Th |
Thin
clients
are generally computer systems on a network
that offer restricted local resources or
have local resources that are enhanced over the network. In most cases
the usage of the term thin client means
a system with a minimal hard drive.
It has input devices for the user
such as a monitor, keyboard
and mouse, but it uses server-side
network applications and storage. Thin clients can be sometimes referred
to as terminals on a network. Three-way-handshake
refers to the process where two protocols
synchronize during establishment of a network
connection. Throughput
is a measurement of the overall performance a computer
system. It looks at the amount of time it takes for data
to get through the entire system.
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TI
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TIFF
is an
acronym for Tagged Image File Format. This is a type of a bit
mapped graphics file that simulates
gray scale shading and is used mainly with scanned images. It has similarities
with and can be converted easily to the GIF
format. Title
bars
in a GUI operating
system are the bars that stretch across the top of a window.
They have the title of the window written on it and usually have an X
in one corner that can be used to exit
the application and close the window.
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To |
Token
is a term for a special bit configuration
used on a local area network by certain network
protocols. A node can access the network
if it has the proper token. They are used in token
ring networks. Token
ring networks
are local area network that are in a ring
configuration and uses token passing protocols
for verification allowing a node to access
the network if it has a token. Toolbars
in a GUI operating
system is a special bar in a window
that contains rows of icons or buttons.
They can be used to perform operations with a click
of the mouse. Topology
of a network is the
mapping of the
network architecture showing allowable
connectivity between nodes. It is shown
with a topological diagram of the network.
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Tr |
Trackballs
are user input
devices similar to a mouse where the
user rolls the ball with a finger to move
the cursor on the screen.
Tracks
on a floppy disk or hard
disk refer to distinct areas encoded on the disk for data
saving. Transceivers
are
hardware devices that does both transmit
and receive data. They are physical devices
used to connect hosts to an interface
on a local area network. Ethernet
transceivers can apply signals to the parts of the cable and sense collisions
on a network. Transport
layer
refers to the layer of the OSI network model
that is responsible for reliable data transfer
between all end systems on a network.
Tripwires
are software utilities
that catch intruder users on a computer
system when they access special files while trying to access a network.
Trojans
are pieces of
insidious programming
that are hidden within a software application
or in a file. Trojans were originally know
as Trojan Horses for their ability to carry malicious instructions in
a pleasant package. They are usually hard to detect, especially when masked
by other applications. They lie in wait
on a computer system and then can open
back doors, start spyware
or just wreak havoc when activated. They can delete
files, crash computers, or corrupt the
system and even effect other networked computer
systems. The best defense against a trojan is for the user
to not download products or open email
attachments from untrustworthy sources. If a trojan is detected on a system
a web search
engine can usually help find a way to eradicate it. Open
source software applications can give users more confidence of not
containing trojans since all the source code
is openly viewable.
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Tu
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Tunneling
is the method of transmitting data over
a network with a protocol
that is not supported by encapsulating
that protocol inside another supported protocol.
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