Computer Terms Q
through Z
Query
- Usually a
phrase or
question typed
into a search
engine like
Google used to
find
information. A
query is used in
databases in
like manner, to
find information
or users, etc.
RDF --
(Resource
Definition
Framework)
A set of rules
for creating
descriptions of
information or
information
available on the
World Wide Web.
RDF could be
used to describe
a collection of
books,
musicians,
artists, or a
collection of
web pages (as in
the RSS data
format which
uses RDF to
create
machine-readable
summaries of web
sites).
ROTFL -
Rolling On The
Floor Laughing.
Shorthand used
in Chat and
other Internet
communications.
Router
A device that
handles the
connection
between 2 or
more networks.
Routers look at
the source and
destination
addresses of the
packets passing
through them and
decide which
route to send
them on.
RSS --
(Rich Site
Summary or RDF
Site Summary or
Real Simple
Syndication)
A now wildly
popular web
protocol for
syndication and
sharing of
content. It was
originally
developed to
facilitate the
syndication of
news articles,
but is now even
more widely used
to share the
content of blogs.
There are RSS
"feeds" which
are sources of
RSS information
about web sites,
and RSS
"readers" which
read RSS feeds
and display
their content to
users.
RTSP --
(Real Time
Streaming
Protocol) RTSP
is an official
Internet
standard (RFC
2326) for
delivering and
receiving
streams of data
such as audio
and video. The
standard allows
for both
real-time
("live") streams
of data and
streams from
stored data.
SDSL --
(Symmetric
Digital
Subscriber Line)
A version of DSL
where the upload
speeds and
download speeds
are the same.
Very Rare.
Search Engine
A web-based
system for
searching the
information
available on the
World Wide Web.
Security
Certificate
Information
(often stored as
a text file)
that is used by
the SSL protocol
to establish a
secure
connection.
Usually used
where financial
or private
information is
to be
transmitted.
Server
A computer that
"serves"
information or
services to
other computer.
The term can
refer to a
particular piece
of software,
such as "Apache"
or to the
machine on which
the software is
running. A
server can
perform several
functions at
once: for
example it can
be a "Web"
server which
serves web pages
and a mail
server which
provides
Internet mail
functions.
Servlet
A small computer
program designed
to be add
capabilities to
a larger piece
of server
software,
usually written
in Java. "Java
servlets" are
small programs
written in the
Java language
and which are
added to a web
server.
Typically a web
server that uses
Java servlets
will have many
of them, each
one designed to
handle a very
specific
function.
SMTP --
(Simple Mail
Transfer
Protocol)
The most popular
protocol used to
send email from
server to server
on the Internet.
SNMP --
(Simple Network
Management
Protocol)
A set of
standards for
communication
with devices,
like routers,
hubs, and
switches,
connected to a
TCP/IP network.
SOAP --
(Simple Object
Access Protocol)
A protocol for
client-server
communication
that sends and
receives
information "on
top of" HTTP.
The data sent
and received is
in a particular
XML format
specifically
designed for use
with SOAP.
Microsoft's
".NET" framework
is based on
SOAP.
Spam
Unwanted,
unsolicited
email or any
other form or
electronic
communication
(USENET, Instant
Messaging)
usually
advertising
products or
pornography.
Spyware
Applications
that contain
programming to
collect data
from a "host"
computer
(usually a
consumer) and
transmit it to
the developer's
computer for
financial gain
or identity
theft. Adware
can be a form of
spyware if it
displays
advertisements
based on a
consumer's
behavior on
their own
personal
computer.
SQL --
(Structured
Query Language)
A specialized
language for
sending queries
to databases.
Most often used
as database for
Web related
structures and
sites
SSL --
(Secure Socket
Layer)
A protocol to
enable
encrypted,
authenticated
communications
across the
Internet.
Sysop --
(System
Operator)
Anyone
responsible for
the physical
operations of a
computer system
or network
resource.
T-1
A leased-line
connection
capable of
carrying data at
1,544,000
bits-per-second.
At maximum
theoretical
capacity, a T-1
line could move
a megabyte in
less than 10
seconds.
T-3
A leased-line
connection
capable of
carrying data at
44,736,000
bits-per-second.
Usually 3
T-1 lines.
Tag
Commonly, a tag
is a basic
element of the
languages used
to create web
pages (HTML) and
similar
languages such
as XML.
TCP/IP
-- (Transmission
Control
Protocol/Internet
Protocol)
This is the
suite of
protocols that
define the
Internet. TCP/IP
software is now
included with
every major kind
of computer
operating
system. To be on
the Internet,
your computer
must have TCP/IP
software.
Telnet
The command and
program used to
login from one
Internet site to
another. The
telnet
command/program
gets you to the
login: prompt of
another host.
Terabyte
1000 gigabytes.
Terminal
A device
that allows you
to send commands
to a computer
somewhere else,
usually a
computer.
Top Level
Domain The
last part of a
domain name i.e.
com, .net, .org,
etc. For
instance
http://boonelakeassociation.org
the .org is the
Top Level
Domain. The
types of top
level domains
are growing and
now include
.biz, .com, .edu,
.gov, .info, .int,
.mil, .net, .cc
and many others.
The list
continues to
grow.
Trojan Horse
(trojan) A
computer program
that is either
hidden inside
another program
or that
masquerades as
something it is
not in order to
trick users into
running it. For
example a
program that
appears to be a
game or image
file but in
reality performs
some other
function. The
term "Trojan
Horse" comes
from a ruse of
war used by the
Greeks sometime
between 1500 and
1200 B.C. A
Trojan Horse
computer program
may spread
itself by
sending copies
of itself from
the host
computer to
other computers,
but unlike a
virus it will
(usually) not
infect other
programs.
UDP --
(User Datagram
Protocol)
One of the
protocols for
data transfer
that is part of
the TCP/IP suite
of protocols.
UDP is a
"stateless"
protocol in that
UDP makes no
provision for
acknowledgement
of packets
received.
See also: Packet
Switching,
TCP/IP
Unix - A
computer
operating
system. Unix is
designed to be
used by many
people at the
same time (it is
multi-user) and
has TCP/IP
built-in. It is
the most common
operating system
for servers on
the Internet.
Apple computers'
Macintosh
operating
system, as of
version 10 Mac
OS X is based on
Linux which is
based on Unix.
Upload
Transferring
data (usually a
file) from a the
computer you are
using to another
computer. The
opposite of
download.
URL --
(Uniform
Resource
Locator)
The term URL is
the same as "Web
Address" - a
location on the
Internet.
http://boonelakeassociation.org
is a URL.
USENET -
A world-wide
system of
discussion
groups, with
comments passed
among hundreds
of thousands of
machines. Not
all USENET
machines are on
the Internet.
USENET is
completely
decentralized,
with over 10,000
discussion
areas, called
newsgroups.
UUENCODE
-- (Unix to Unix
Encoding)
A method for
converting files
from Binary to
ASCII (text) so
that they can be
sent across the
Internet via
email.
Virus -
A piece of
computer
programming code
that makes
copies of itself
without any
other
intervention.
Some viruses do
more than simply
replicate
themselves, they
might display
messages,
install other
software or
files, delete
software of
files, etc. A
virus requires
the presence of
some other
program to
replicate
itself.
Typically
viruses spread
by attaching
themselves to
programs and in
some cases
files..
VOIP --
(Voice Over IP)
A specification
and various
technologies
used to allow
making telephone
calls over IP
networks,
especially the
Internet. This
is one of the
fastest growing
areas of the
Internet as VoIP
phone networks
are cutting into
traditional
phone lines
because of the
higher quality
of voice and
lower cost to
consumers.
Normally there
is no such thing
as domestic long
distance charges
with VoIP
telephone
service. VoIP
may cut into
Cell Phones
someday as
wireless
networks become
more available.
We might all be
using wireless
VoIP phones in
the coming
years.
VPN --
(Virtual Private
Network)
Usually refers
to a network in
which some of
the parts are
connected using
the public
Internet, but
the data sent
across the
Internet is
encrypted, so
the entire
network is
"virtually"
private.
WAIS --
(Wide Area
Information
Servers)
Developed in the
early 1990s WAIS
was the first
truly
large-scale
system to allow
the indexing of
huge quantities
of information
on the Web, and
to make those
indices
searchable
across networks
such as the
Internet.
WAN --
(Wide Area
Network)
Any internet or
network that
covers an area
larger than a
single building
or campus.
Web --
Short for "World
Wide Web."
Web page -
A document
designed for
viewing in a web
browser.
Typically
written in HTML.
A web site is
made of one or
more web pages.
Website
The entire
collection of
web pages and
other
information
(such as images,
sound, and video
files, etc.)
that are made
available
through what
appears to users
as a single web
server.
Typically all
the of pages in
a web site share
the same basic
URL, for example
the following
URLs are all for
pages within the
same web site:
Wi-Fi --
(Wireless
Fidelity)
A popular term
for a form of
wireless data
communication,
basically Wi-Fi
is "Wireless
Ethernet".
Worm -- A
worm is a virus
that does not
infect other
programs. It
makes copies of
itself, and
infects
additional
computers
(typically by
making use of
network
connections) but
does not attach
itself to
additional
programs;
however a worm
might alter,
install, or
destroy files
and programs.
WWW --
(World Wide Web)
World Wide Web
(or simply Web
for short) is a
term frequently
used
(incorrectly)
when referring
to "The
Internet", WWW
has two major
meanings: First,
loosely used:
the whole
conglomeration
of resources
that can be
accessed using
Gopher, FTP,
HTTP, telnet,
USENET, WAIS and
some other
tools. Second,
the billions of
"Web pages" that
are served by
Web servers and
viewed by a Web
browser.
XML -- (eXtensible
Markup Language)
A widely used
system for
defining data
formats. XML
provides a very
rich system to
define complex
documents and
data structures
such as
invoices,
molecular data,
news feeds,
glossaries,
inventory
descriptions,
real estate
properties,
etc. As long as
a programmer has
the XML
definition for a
collection of
data (often
called a
"schema") then
they can create
a program to
reliably process
any data
formatted
according to
those rules.
XUL -- (eXtensible
User-interface
Language)
A markup
language similar
to HTML and
based on XML.
XUL used to
define what the
user interface
will look like
for a particular
piece of
software. XUL is
used to define
what buttons,
scrollbars, text
boxes, and other
user-interface
items will
appear, but it
is not used to
define how those
item will look.
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