| T-1 |
A digital leased-line connection
capable of carrying data at 1,544,000 bits-per-second. The T-1 line
carries 24 pulse code modulation (PCM) signals using time-division
multiplexing (TDM) at an overall rate of 1.544 Mbps.
T-1 lines use copper wire and span distances within and between major
metropolitan areas. T-3 (44.736 Mbps) is a higher speed digital line
using the same technology. (See also DSx.) |
| TCP/IP |
(Transmission Control Protocol/Internet
Protocol) - This is the suite of protocols
that defines Internet
communications. TCP/IP is a two-layer program. The higher layer, Transmission
Control Protocol, manages the assembling of a message or file into
smaller packets
that are transmitted over the Internet and received by a TCP layer
that reassembles the packets into the original message. The lower
layer, Internet Protocol, handles the address part of each packet
so that it gets to the right destination. Each gateway computer or
router on the network
checks this address to see where to forward the message. Even though
some packets from the same message are routed differently than others,
they are reassembled at the destination. TCP/IP uses the client/server
model of communication in which a computer user (a client)
requests and is provided a service (such as sending a web
page) by another computer (a server)
on the network. TCP/IP communication is primarily point-to-point,
meaning each communication is from one point (or host
computer) in the network to another point or host computer. |
| Telnet |
Telnet is the way to access another
computer, assuming you have permission. (Such a computer is frequently
called a host computer.)
More technically, Telnet is a user command and an underlying TCP/IP
protocol for
accessing remote computers. On the web,
HTTP and FTP
protocols allow you to request specific files from remote computers,
but not to actually be logged on as a user of that computer. With
Telnet, you log on as a regular user with whatever privileges you
may have been granted to the specific application and data on that
computer. Telnet is most likely to be used by program developers and
anyone who has a need to use specific applications or data located
at a particular host computer. |
| Terabyte |
(TB) - 1024 gigabytes,
240 bytes. |
| Top Level
Domain Name |
(TLD) - The part of a domain
name that identifies it generically as a domain class such as
.com (commercial), .net (network), .org (for nonprofit organizations,
industry groups, and others), .gov (government), .mil (for the military),
and .edu (for educational institutions). For example, in the domain
name
www.ShenValleyOnline.net,
the Net is the top level domain name.
|
| URL |
(Uniform Resource Locator) - The standard way to give the address
of any resource on the Internet
that is part of the World
Wide Web. The type of resource depends on the Internet application
protocol. Using
the web's HTTP
protocol, the resource can be an HTML
page, an image file, a program such as a CGI
or Perl script,
or any other file supported by HTTP. The URL contains the name of
the protocol required to access the resource, a domain
name that identifies a specific computer on the Internet, and
a hierarchical description of a file location on the computer. On
the web (which uses
HTTP), an example of a URL is:
http//www.ShenValleyOnline.net/glossary/glossary5.html
This URL describes a web
page to be accessed with an HTTP (web
browser) application that is located in a domain named www.ShenValleyOnline.net.
The specific file is named 'glossary5.html' and is in the directory
named 'glossary'.
|
| Usenet |
A collection of user-submitted
messages on various subjects (discussion groups) that are posted to
servers on the
World Wide Web. Each
subject collection of posted messages is known as a newsgroup.
There are thousands of newsgroups and it is possible for you to form
new ones. Usenet's original protocol
was UUCP (UNIX-to-UNIX
Copy), but today NNTP
is used. |
| UNIX |
(also spelled 'Unix') - An operating
system that originated at Bell Labs in 1969. UNIX is a popular
operating system for web servers because it is more reliable than
Windows NT. Because
it was not a proprietary operating system owned by one of the leading
computer companies and because it is written in a standard language
("C") and embraced many popular ideas, UNIX became the first
open or standard operating system that could be improved or enhanced
by anyone. Many of the major computer companies have created their
own versions of UNIX (such as AIX by IBM, HP-UX by HP, and Solaris
by Sun Microsystems). |
| VB
Script |
The Microsoft® Visual Basic®
programming language is a fast, portable, lightweight interpreter
for use in web
browsers and other application objects such as ActiveX® Controls.
|
| Virtual Hosting |
The provision of web
hosting services by a service provider so that a company doesn't
have to purchase and maintain its own web
servers and connections to the Internet.
Some companies providing this service simply call it "hosting."
Typically, virtual hosting provides a customer who wants a web
site with file storage and directory setup for the web site files
(HTML and graphic
image files), e-mail
addresses, provisions for the execution of scripts,
and more. The user (the web site owner) needs only to have an FTP
program for exchanging files with the host. Usually, the server is
shared by multiple Web site owners (shared
hosting) so that each owner can use and administer it as though
they had complete control of the server. Users of a virtual server
do not have to manage the hardware and software aspects of maintaining
a server and effectively
share the cost of expensive network
connections to the Internet. |
| Virus |
A program, usually hidden or disguised
as something else that causes some unexpected and usually undesirable
event. A computer virus is often designed so that it is automatically
spread to other computer users. Viruses can be transmitted as attachments
to e-mail messages,
within downloaded files, or on a floppy disk or CD. The source of
the e-mail message, downloaded file, or disk is often unaware of the
virus. Some viruses wreak their havoc as soon as their code is executed;
other viruses lie dormant until predefined circumstances (such as
a date) cause their code to be executed by the computer. Some viruses
are playful in intent and effect and some can be quite harmful, erasing
data or causing your hard disk to require reformatting. The best protection
against computer viruses is a good antivirus
program such as Norton Antivirus. |
| WAN |
(Wide Area Network) - Any internet
or network that
covers an area larger than a LAN. |
| Warez |
(Pronounced as though spelled "wares" or by some pronounced
like the city of "Juarez") - A term used by software "pirates"
to describe software that has been stripped of its copy-protection
and made available on the Internet
for downloading.
|
| Web |
Refers to the World
Wide Web. The usage of 'web' was a reference to the multiple interconnections
of the packet
switching network
that forms the Internet. |
| Web
Browser |
Client
software that is used to look at a number of different kinds of Internet
resources. Examples include Microsoft® Internet
Explorer, Netscape,
and Opera. |
| Web Host |
(1) A web
server computer that stores and serves the HTML
pages, images, files, etc. for one or more web
sites. (2) The company that provides that service, which
is known as hosting.
|
| Web Page |
An HTML
document with its own web address (URL).
The first page usually requested from a web
site is called the 'home
page'. With frames,
multiple pages (HTML files) can be downloaded to a browser
and arranged on designated sections of the display screen at the same
time - these are also collectively termed a 'web page'. |
| Web server |
A computer that stores all of
the HTML pages, graphic
images, scripts,
etc. that make up a web
site and respond to clients
with the requested data. |
| Web Site |
A collection of interlinked web
pages, usually under a single domain
name, which includes an intended beginning file called a 'home
page.' From the home page, the user can get to the other pages
on the web site. |
| Whois |
A program or script
used to query databases
of domain
names, IP
addresses, and their associated contact information that are maintained
by the domain name registrars. |
| Windows® NT |
Microsoft's original 32-bit operating system. Some
web hosting companies
use Windows NT (or it's successor Windows 2000) in their servers
to offer support for Microsoft base products such as
MS Access, MS SQL,
and FrontPage.
FrontPage extensions are also available on many UNIX
and Linux-based
servers. |
| World Wide Web |
(WW W) - All the resources and
users on the Internet
that use HTTP. |
| WYSIWYG |
(What You See Is What You Get)
- A graphical editor or program that allows the user to create a web
page, text file, or image so that he or she can see what the end
result will look like while the document is being created. WYSIWYG
web page editors such as Adobe PageMill, Macromedia Dreamweaver, and
Microsoft FrontPage
are used to create HTML
pages but conceal the actual markup language (HTML) and allow the
creator to think almost entirely in terms of how the page should appear. |
