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December 25, 2010 08:54 AM
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Glossary of Internet Terms |
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- ADN
- (Advanced Digital Network)
-- Usually refers to a 56Kbps leased-line.
- ADSL
-
See: DSL
- Anonymous
FTP
-
See: FTP
- Applet
- A small Java
program that can be embedded in an HTML page.
Applets differ from full-fledged Java applications in
that they are not allowed to access certain resources on
the local computer, such as files and serial devices
(modems, printers, etc.), and are prohibited from
communicating with most other computers across a
network. The current rule is that an applet can only
make an Internet connection to the computer from which
the applet was sent.
See Also: HTML
, Java
- Archie
- A tool (software) for
finding files stored on anonymous FTP sites. You
need to know the exact file name or a substring of it.
- ARPANet
- (Advanced Research
Projects Agency Network) -- The precursor to the Internet.
Developed in the late 60’s and early 70’s by the US
Department of Defense as an experiment in
wide-area-networking that would survive a nuclear war.
See Also: Internet
- ASCII
- (American Standard Code
for Information Interchange) -- This is the de facto
world-wide standard for the code numbers used by
computers to represent all the upper and lower-case
Latin letters, numbers, punctuation, etc. There are 128
standard ASCII codes each of which can be represented by
a 7 digit binary number: 0000000 through 1111111.
- Backbone
- A high-speed line or
series of connections that forms a major pathway within
a network. The term is relative as a backbone in a small
network will likely be much smaller than many
non-backbone lines in a large network.
See Also: Network
- Bandwidth
- How much stuff you can
send through a connection. Usually measured in
bits-per-second. A full page of English text is about
16,000 bits. A fast modem can move about 15,000 bits in
one second. Full-motion full-screen video would require
roughly 10,000,000 bits-per-second, depending on
compression.
See Also: Bps
, Bit
, T-1
- Baud
- In common usage the baud
rate of a modem is how many bits it can
send or receive per second. Technically, baud is the
number of times per second that the carrier signal
shifts value - for example a 1200 bit-per-second modem
actually runs at 300 baud, but it moves 4 bits per baud
(4 x 300 = 1200 bits per second).
See Also: Bit
, Modem
- BBS
- (Bulletin Board System) --
A computerized meeting and announcement system that
allows people to carry on discussions, upload and
download files, and make announcements without the
people being connected to the computer at the same time.
There are many thousands (millions?) of BBS’s around
the world, most are very small, running on a single IBM
clone PC with 1 or 2 phone lines. Some are very large
and the line between a BBS and a system like CompuServe
gets crossed at some point, but it is not clearly drawn.
- Binhex
- (BINary HEXadecimal) -- A
method for converting non-text files (non-ASCII) into ASCII.
This is needed because Internet e-mail can only handle
ASCII.
See Also: ASCII
, MIME
, UUENCODE
- Bit
- (Binary DigIT) -- A single
digit number in base-2, in other words, either a 1 or a
zero. The smallest unit of computerized data. Bandwidth
is usually measured in bits-per-second.
See Also: Bandwidth
, Bps
, Byte
, Kilobyte
, Megabyte
- BITNET
- (Because It’s Time
NETwork (or Because It’s There NETwork)) -- A network
of educational sites separate from the Internet, but
e-mail is freely exchanged between BITNET and the
Internet. Listservs®, the most popular form of
e-mail discussion groups, originated on BITNET. BITNET
machines are usually mainframes running the VMS
operating system, and the network is probably the only
international network that is shrinking.
- Bps
- (Bits-Per-Second) -- A
measurement of how fast data is moved from one place to
another. A 28.8 modem can move 28,800 bits per
second.
See Also: Bandwidth
, Bit
- Browser
- A Client program
(software) that is used to look at various kinds of
Internet resources.
See Also: Client
, URL
, WWW
, Netscape
, Mosaic
, Home
Page (or Homepage)
- BTW
- (By The Way) -- A
shorthand appended to a comment written in an online
forum.
See Also: IMHO
- Byte
- A set of Bits that
represent a single character. Usually there are 8 Bits
in a Byte, sometimes more, depending on how the
measurement is being made.
See Also: Bit
- Certificate
Authority
- An issuer of Security
Certificates used in SSL connections.
See Also: Security
Certificate , SSL
- CGI
- (Common Gateway Interface)
-- A set of rules that describe how a Web Server
communicates with another piece of software on the same
machine, and how the other piece of software (the “CGI
program”) talks to the web server. Any piece of
software can be a CGI program if it handles input and
output according to the CGI standard.
Usually a CGI program is a small program that takes data
from a web server and does something with it, like
putting the content of a form into an e-mail message, or
turning the data into a database query.
You can often see that a CGI program is being used by
seeing “cgi-bin” in a URL, but not always.
See Also: cgi-bin
, Web
- cgi-bin
- The most common name of a
directory on a web server in which CGI programs
are stored.
The “bin” part of “cgi-bin” is a shorthand
version of “binary”, because once upon a time, most
programs were refered to as “binaries”. In real
life, most programs found in cgi-bin directories are
text files -- scripts that are executed by binaries
located elsewhere on the same machine.
See Also: CGI
- Client
- A software program that is
used to contact and obtain data from a Server
software program on another computer, often across a
great distance. Each Client program is designed
to work with one or more specific kinds of Server
programs, and each Server requires a specific
kind of Client. A Web Browser is a
specific kind of Client.
See Also: Browser
, Server
- co-location
- Most often used to refer
to having a server that belongs to one person or
group physically located on an Internet-connected
network that belongs to another person or group.
Usually this is done because the server owner wants
their machine to be on a high-speed Internet connection
and/or they do not want the security risks of having the
server on thier own network.
See Also: Internet
, Server
, Network
- Cookie
- The most common meaning of
“Cookie” on the Internet refers to a piece of
information sent by a Web Server to a Web Browser
that the Browser software is expected to save and to
send back to the Server whenever the browser makes
additional requests from the Server.
Depending on the type of Cookie used, and the
Browser’s settings, the Browser may accept or not
accept the Cookie, and may save the Cookie for either a
short time or a long time.
Cookies might contain information such as login or
registration information, online “shopping cart”
information, user preferences, etc.
When a Server receives a request from a Browser that
includes a Cookie, the Server is able to use the
information stored in the Cookie. For example, the
Server might customize what is sent back to the user, or
keep a log of particular user’s requests.
Cookies are usually set to expire after a predetermined
amount of time and are usually saved in memory until the
Browser software is closed down, at which time they may
be saved to disk if their “expire time” has not been
reached.
Cookies do not read your hard drive and
send your life story to the CIA, but they can be used to
gather more information about a user than would be
possible without them.
See Also: Browser
, Server
- Cyberpunk
- Cyberpunk was originally a
cultural sub-genre of science fiction taking place in a
not-so-distant, dystopian, over-industrialized society.
The term grew out of the work of William Gibson and
Bruce Sterling and has evolved into a cultural label
encompassing many different kinds of human, machine, and
punk attitudes. It includes clothing and lifestyle
choices as well.
See Also: Cyberspace
- Cyberspace
- Term originated by author
William Gibson in his novel Neuromancer the word
Cyberspace is currently used to describe the whole range
of information resources available through computer
networks.
- Digerati
- The digital version of
literati, it is a reference to a vague cloud of people
seen to be knowledgeable, hip, or otherwise in-the-know
in regards to the digital revolution.
- DSL
- (Digital Subscriber Line)
-- A method for moving data over regular phone lines. A
DSL circuit is much faster than a regular phone
connection, and the wires coming into the subscriber’s
premises are the same (copper) wires used for regular
phone service. A DSL circuit must be configured to
connect two specific locations, similar to a leased
line.
A commonly discussed configuration of DSL allows
downloads at speeds of up to 1.544 megabits (not megabytes)
per second, and uploads at speeds of 128 kilobits per
second. This arrangement is called ADSL:
“Asymmetric” Digital Subscriber Line.
Another common configuration is symmetrical: 384
Kilobits per second in both directions.
In theory ADSL allows download speeds of up to 9
megabits per second and upload speeds of up to 640
kilobits per second.
DSL is now a popular alternative to Leased Lines
and ISDN, being faster than ISDN and less costly
than traditional Leased Lines.
See Also: bit
, bps
, ISDN
, Leased
Line
- Domain
Name
- The unique name that
identifies an Internet site. Domain Names always have 2
or more parts, separated by dots. The part on the left
is the most specific, and the part on the right is the
most general. A given machine may have more than one
Domain Name but a given Domain Name points to only one
machine. For example, the domain names:
matisse.net
mail.matisse.net
workshop.matisse.net
can all refer to the same machine, but each domain name
can refer to no more than one machine.
Usually, all of the machines on a given Network
will have the same thing as the right-hand portion of
their Domain Names (matisse.net in the
examples above). It is also possible for a Domain Name
to exist but not be connected to an actual machine. This
is often done so that a group or business can have an
Internet e-mail address without having to establish a
real Internet site. In these cases, some real Internet
machine must handle the mail on behalf of the listed
Domain Name.
See Also: IP
Number
- E-mail
- (Electronic Mail) --
Messages, usually text, sent from one person to another
via computer. E-mail can also be sent automatically to a
large number of addresses (Mailing List).
See Also: Listserv®
, Maillist
- Ethernet
- A very common method of
networking computers in a LAN. Ethernet will
handle about 10,000,000 bits-per-second and can be used
with almost any kind of computer.
See Also: Bandwidth
, LAN
- FAQ
- (Frequently Asked
Questions) -- FAQs are documents that list and answer
the most common questions on a particular subject. There
are hundreds of FAQs on subjects as diverse as Pet
Grooming and Cryptography. FAQs are usually written by
people who have tired of answering the same question
over and over.
- FDDI
- (Fiber Distributed Data
Interface) -- A standard for transmitting data on
optical fiber cables at a rate of around 100,000,000
bits-per-second (10 times as fast as Ethernet,
about twice as fast as T-3).
See Also: Bandwidth
, Ethernet
, T-1
, T-3
- Finger
- An Internet software tool
for locating people on other Internet sites. Finger is
also sometimes used to give access to non-personal
information, but the most common use is to see if a
person has an account at a particular Internet site.
Many sites do not allow incoming Finger requests, but
many do.
- Fire
Wall
- A combination of hardware
and software that separates a LAN into two or
more parts for security purposes.
See Also: Network
, LAN
- Flame
- Originally, flame meant to
carry forth in a passionate manner in the spirit of
honorable debate. Flames most often involved the use of
flowery language and flaming well was an art form. More
recently flame has come to refer to any kind of
derogatory comment no matter how witless or crude.
See Also: Flame
War
- Flame
War
- When an online discussion
degenerates into a series of personal attacks against
the debators, rather than discussion of their positions.
A heated exchange.
See Also: Flame
- FTP
- (File Transfer Protocol)
-- A very common method of moving files between two
Internet sites. FTP is a special way to login to
another Internet site for the purposes of retrieving
and/or sending files. There are many Internet sites that
have established publicly accessible repositories of
material that can be obtained using FTP, by logging in
using the account name anonymous, thus these sites are
called anonymous ftp servers.
- Gateway
- The technical meaning is a
hardware or software set-up that translates between two
dissimilar protocols, for example Prodigy has a gateway
that translates between its internal, proprietary e-mail
format and Internet e-mail format. Another, sloppier
meaning of gateway is to describe any mechanism for
providing access to another system, e.g. AOL might be
called a gateway to the Internet.
- GIF
- (Graphic Interchange
Format) -- A common format for image files, especially
suitable for images containing large areas of the same
color. GIF format files of simple images are often
smaller than the same file would be if stored in JPEG
format, but GIF format does not store photographic
images as well as JPEG.
See Also: JPEG
- Gigabyte
- 1000 or 1024 Megabytes,
depending on who is measuring.
See Also: Byte
, Megabyte
- Gopher
- A widely successful method
of making menus of material available over the Internet.
Gopher is a Client and Server style
program, which requires that the user have a Gopher Client
program. Although Gopher spread rapidly across the globe
in only a couple of years, it has been largely
supplanted by Hypertext, also known as WWW (World
Wide Web). There are still thousands of Gopher Servers
on the Internet and we can expect they will remain for a
while.
See Also: Client
, Server
, WWW
, Hypertext
- hit
- As used in reference to
the World Wide Web, “hit” means a single request
from a web browser for a single item from a web server;
thus in order for a web browser to display a page that
contains 3 graphics, 4 “hits” would occur at the
server: 1 for the HTML page, and one for each of
the 3 graphics.
“hits” are often used as a very rough measure of
load on a server, e.g. “Our server has been getting
300,000 hits per month.” Because each “hit” can
represent anything from a request for a tiny document
(or even a request for a missing document) all the way
to a request that requires some significant extra
processing (such as a complex search request), the
actual load on a machine from 1 hit is almost impossible
to define.
- Home
Page (or Homepage)
- Several meanings.
Originally, the web page that your browser
is set to use when it starts up. The more common meaning
refers to the main web page for a business,
organization, person or simply the main page out of a
collection of web pages, e.g. “Check out so-and-so’s
new Home Page.”
Another sloppier use of the term refers to practically
any web page as a “homepage,” e.g. “That web site
has 65 homepages and none of them are interesting.”
See Also: Browser
, Web
- Host
- Any computer on a network
that is a repository for services available to other
computers on the network. It is quite common to
have one host machine provide several services, such as WWW
and USENET.
See Also: Node
, Network
- HTML
- (HyperText Markup
Language) -- The coding language used to create Hypertext
documents for use on the World Wide Web. HTML
looks a lot like old-fashioned typesetting code, where
you surround a block of text with codes that indicate
how it should appear, additionally, in HTML you can
specify that a block of text, or a word, is linked to
another file on the Internet. HTML files are meant to be
viewed using a World Wide Web Client Program,
such as Netscape or Mosaic.
See Also: Client
, Server
, WWW
- HTTP
- (HyperText Transfer
Protocol) -- The protocol for moving hypertext
files across the Internet. Requires a HTTP client
program on one end, and an HTTP server program on
the other end. HTTP is the most important protocol used
in the World Wide Web (WWW).
See Also: Client
, Server
, WWW
- Hypertext
- Generally, any text that
contains links to other documents - words or phrases in
the document that can be chosen by a reader and which
cause another document to be retrieved and displayed.
- IMHO
- (In My Humble Opinion) --
A shorthand appended to a comment written in an online
forum, IMHO indicates that the writer is aware that they
are expressing a debatable view, probably on a subject
already under discussion. One of may such shorthands in
common use online, especially in discussion forums.
See Also: BTW
- Internet
- (Upper case I) The
vast collection of inter-connected networks that all use
the TCP/IP protocols and that evolved from the ARPANET
of the late 60’s and early 70’s. The Internet now
(July 1995) connects roughly 60,000 independent networks
into a vast global internet.
See Also: internet
- internet
- (Lower case i) Any
time you connect 2 or more networks together, you
have an internet - as in inter-national or inter-state.
See Also: Internet
, Network
- Intranet
- A private network
inside a company or organization that uses the same
kinds of software that you would find on the public Internet,
but that is only for internal use.
As the Internet has become more popular many of the
tools used on the Internet are being used in private
networks, for example, many companies have web servers
that are available only to employees.
Note that an Intranet may not actually be an internet
-- it may simply be a network.
See Also: internet
, Internet
, Network
- IP
Number
- (Internet Protocol Number)
-- Sometimes called a dotted quad. A unique number
consisting of 4 parts separated by dots, e.g.
165.113.245.2
Every machine that is on the Internet has a unique IP
number - if a machine does not have an IP number, it is
not really on the Internet. Most machines also have one
or more Domain Names that are easier for people
to remember.
See Also: Domain
Name , Internet
, TCP/IP
- IRC
- (Internet Relay Chat) --
Basically a huge multi-user live chat facility. There
are a number of major IRC servers around the
world which are linked to each other. Anyone can create
a channel and anything that anyone types in a given
channel is seen by all others in the channel. Private
channels can (and are) created for multi-person
conference calls.
- ISDN
- (Integrated Services
Digital Network) -- Basically a way to move more data
over existing regular phone lines. ISDN is rapidly
becoming available to much of the USA and in most
markets it is priced very comparably to standard analog
phone circuits. It can provide speeds of roughly 128,000
bits-per-second over regular phone lines. In practice,
most people will be limited to 56,000 or 64,000
bits-per-second.
- ISP
- (Internet Service
Provider) -- An institution that provides access to the
Internet in some form, usually for money.
See Also: Internet
- Java
- Java is a network-oriented
programming language invented by Sun Microsystems that
is specifically designed for writing programs that can
be safely downloaded to your computer through the
Internet and immediately run without fear of viruses or
other harm to your computer or files. Using small Java
programs (called "Applets"), Web pages
can include functions such as animations, calculators,
and other fancy tricks.
We can expect to see a huge variety of features added to
the Web using Java, since you can write a Java program
to do almost anything a regular computer program can do,
and then include that Java program in a Web page.
See Also: Applet
- JavaScript
- JavaScript is a
programming language that is mostly used in web pages,
usually to add features that make the web page more
interactive. When JavaScript is included in an HTML
file it relies upon the browser to interpret the
JavaScript. When JavaScript is combined with Cascading
Style Sheets (CSS), and later versions of HTML (4.0
and later) the result is often called DHTML.
JavaScript was invented
by Netscape and was going to be called "LiveScript",
but the name was changed to JavaScript to cash in on the
popularity of Java. JavaScript and Java are two
different programming languages.
See Also:
HTML,
Java
- JDK
- (Java Development Kit) --
A software development package from Sun Microsystems
that implements the basic set of tools needed to write,
test and debug Java applications and applets
See Also: Applet
, Java
- JPEG
- (Joint Photographic
Experts Group) -- JPEG is most commonly mentioned as a
format for image files. JPEG format is preferred to the GIF
format for photographic images as opposed to line art or
simple logo art.
See Also: GIF
- Kilobyte
- A thousand bytes.
Actually, usually 1024 (2^10) bytes.
See Also: Byte
, Bit
- LAN
- (Local Area Network) -- A
computer network limited to the immediate area, usually
the same building or floor of a building.
See Also: Ethernet
- Leased
Line
- Refers to a phone line
that is rented for exclusive 24-hour, 7 -days-a-week use
from your location to another location. The highest
speed data connections require a leased line.
See Also: T-1
, T-3,
DSL
- Listserv®
- The most common kind of maillist,
"Listserv" is a registered trademark of L-Soft
international, Inc. Listservs originated on BITNET
but they are now common on the Internet.
See Also: BITNET
, E-mail
, Maillist
- Login
- Noun or a verb. Noun: The
account name used to gain access to a computer system.
Not a secret (contrast with Password).
Verb: The act of entering into a computer system, e.g. Login
to the WELL and then go to the GBN conference.
See Also: Password
- Maillist
- (or Mailing List) A
(usually automated) system that allows people to send e-mail
to one address, whereupon their message is copied and
sent to all of the other subscribers to the maillist. In
this way, people who have many different kinds of e-mail
access can participate in discussions together.
- Megabyte
- A million bytes.
Actually, technically, 1024 kilobytes.
See Also: Byte
, Bit
, Kilobyte
- MIME
- (Multipurpose Internet
Mail Extensions) -- The standard for attaching non-text
files to standard Internet mail messages. Non-text files
include graphics, spreadsheets, formatted word-processor
documents, sound files, etc.
An email program is said to be MIME Compliant if it can
both send and receive files using the MIME standard.
When non-text files are sent using the MIME standard
they are converted (encoded) into text - although the
resulting text is not really readable.
Generally speaking the MIME standard is a way of
specifying both the type of file being sent (e.g. a
Quicktime™ video file), and the method that should be
used to turn it back into its original form.
Besides email software, the MIME standard is also
universally used by Web Servers to identify the
files they are sending to Web Clients, in this
way new file formats can be accommodated simply by
updating the Browsers’ list of pairs of MIME-Types and
appropriate software for handling each type.
See Also: Browser
, Client
, Server
, Binhex
, UUENCODE
- Mirror
- Generally speaking, “to
mirror” is to maintain an exact copy of something.
Probably the most common use of the term on the Internet
refers to “mirror sites” which are web sites,
or FTP sites that maintain exact copies of
material originated at another location, usually in
order to provide more widespread access to the resource.
Another common use of the term “mirror” refers to an
arrangement where information is written to more than
one hard disk simultaneously, so that if one disk fails,
the computer keeps on working without losing anything.
See Also: FTP
, Web
- Modem
- (MOdulator, DEModulator)
-- A device that you connect to your computer and to a
phone line, that allows the computer to talk to other
computers through the phone system. Basically, modems do
for computers what a telephone does for humans.
- MOO
- (Mud, Object Oriented) --
One of several kinds of multi-user role-playing
environments, so far only text-based.
See Also: MUD
, MUSE
- Mosaic
- The first WWW browser
that was available for the Macintosh, Windows, and UNIX
all with the same interface. Mosaic really started the
popularity of the Web. The source-code to Mosaic has
been licensed by several companies and there are several
other pieces of software as good or better than Mosaic,
most notably, Netscape.
See Also: Browser
, Client
, WWW
- MUD
- (Multi-User Dungeon or
Dimension) -- A (usually text-based) multi-user
simulation environment. Some are purely for fun and
flirting, others are used for serious software
development, or education purposes and all that lies in
between. A significant feature of most MUDs is that
users can create things that stay after they leave and
which other users can interact with in their absence,
thus allowing a world to be built gradually and
collectively.
See Also: MOO
, MUSE
- MUSE
- (Multi-User Simulated
Environment) -- One kind of MUD - usually with little or
no violence.
See Also: MOO
, MUD
- Netiquette
- The etiquette on the Internet.
See Also: Internet
- Netizen
- Derived from the term
citizen, referring to a citizen of the Internet,
or someone who uses networked resources. The term
connotes civic responsibility and participation.
See Also: Internet
- Netscape
- A WWW Browser and
the name of a company. The Netscape (tm) browser was
originally based on the Mosaic program developed
at the National Center for Supercomputing Applications
(NCSA).
Netscape has grown in features rapidly and is widely
recognized as the best and most popular web browser.
Netscape corporation also produces web server
software.
Netscape provided major improvements in speed and
interface over other browsers, and has also engendered
debate by creating new elements for the HTML
language used by Web pages -- but the Netscape
extensions to HTML are not universally supported.
The main author of Netscape, Mark Andreessen, was hired
away from the NCSA by Jim Clark, and they founded a
company called Mosaic Communications and soon changed
the name to Netscape Communications Corporation.
See Also: Browser
, Mosaic
, Server
, WWW
- Network
- Any time you connect 2 or
more computers together so that they can share
resources, you have a computer network. Connect 2 or
more networks together and you have an internet.
See Also: internet
, Internet
, Intranet
- Newsgroup
- The name for discussion
groups on USENET.
See Also: USENET
- NIC
- (Networked Information
Center) -- Generally, any office that handles
information for a network. The most famous of these on
the Internet is the InterNIC, which is where new domain
names are registered.
Another definition: NIC also refers to Network Interface
Card which plugs into a computer and
adapts the network interface to the appropriate
standard. ISA, PCI, and PCMCIA cards are all examples of
NICs.
- NNTP
- (Network News Transport
Protocol) -- The protocol used by client and server
software to carry USENET postings back and forth
over a TCP/IP network. If you are using
any of the more common software such as Netscape,
Nuntius, Internet Explorer, etc. to participate in newsgroups
then you are benefiting from an NNTP connection.
See Also: Newsgroup
, TCP/IP
, USENET
- Node
- Any single computer
connected to a network.
See Also: Network
, Internet
, internet
- Packet
Switching
- The method used to move
data around on the Internet. In packet switching,
all the data coming out of a machine is broken up into
chunks, each chunk has the address of where it came from
and where it is going. This enables chunks of data from
many different sources to co-mingle on the same lines,
and be sorted and directed to different routes by
special machines along the way. This way many people can
use the same lines at the same time.
- Password
- A code used to gain access
to a locked system. Good passwords contain letters and
non-letters and are not simple combinations such as virtue7.
A good password might be:
Hot$1-6
See Also: Login
- Plug-in
- A (usually small) piece of
software that adds features to a larger piece of
software. Common examples are plug-ins for the Netscape®
browser and web server. Adobe Photoshop®
also uses plug-ins.
The idea behind plug-in’s is that a small piece of
software is loaded into memory by the larger program,
adding a new feature, and that users need only install
the few plug-ins that they need, out of a much larger
pool of possibilities. Plug-ins are usually created by
people other than the publishers of the software the
plug-in works with.
- POP
- (Point of Presence, also
Post Office Protocol) -- Two commonly used meanings:
Point of Presence and Post Office Protocol. A Point of
Presence usually means a city or location where a
network can be connected to, often with dial up phone
lines. So if an Internet company says they will soon
have a POP in Belgrade, it means that they will soon
have a local phone number in Belgrade and/or a place
where leased lines can connect to their network. A
second meaning, Post Office Protocol refers to the way
e-mail software such as Eudora gets mail from a mail
server. When you obtain a SLIP, PPP, or shell account
you almost always get a POP account with it, and it is
this POP account that you tell your e-mail software to
use to get your mail.
See Also: SLIP
, PPP
- Port
- 3 meanings. First and most
generally, a place where information goes into or out of
a computer, or both. E.g. the serial port on a personal
computer is where a modem would be connected.
On the Internet port often refers to a number that is
part of a URL, appearing after a colon (:) right
after the domain name. Every service on an
Internet server listens on a particular port
number on that server. Most services have standard port
numbers, e.g. Web servers normally listen on port 80.
Services can also listen on non-standard ports, in which
case the port number must be specified in a URL when
accessing the server, so you might see a URL of the
form:
gopher://peg.cwis.uci.edu:7000/
shows a gopher server running on a non-standard port
(the standard gopher port is 70).
Finally, port also refers to translating a piece of
software to bring it from one type of computer system to
another, e.g. to translate a Windows program so that is
will run on a Macintosh.
See Also: Domain
Name , Server
, URL
- Portal
- Usually used as a
marketing term to described a Web site that is or is
intended to be the first place people see when using the
Web. Typically a "Portal site" has a catalog
of web sites, a search engine, or both. A Portal site
may also offer email and other service to entice people
to use that site as their main "point of
entry" (hence "portal") to the Web.
- Posting
- A single message entered
into a network communications system.
E.g. A single message posted to a newsgroup or
message board.
See Also: Newsgroup
- PPP
- (Point to Point Protocol)
-- Most well known as a protocol that allows a computer
to use a regular telephone line and a modem to
make TCP/IP connections and thus be really and
truly on the Internet.
See Also: IP
Number , Internet
, SLIP
, TCP/IP
- PSTN
- (Public Switched Telephone
Network) -- The regular old-fashioned telephone system.
- RFC
- (Request For Comments) --
The name of the result and the process for creating a
standard on the Internet. New standards are
proposed and published on line, as a Request For
Comments. The Internet Engineering Task Force is a
consensus-building body that facilitates discussion, and
eventually a new standard is established, but the
reference number/name for the standard retains the
acronym RFC, e.g. the official standard for e-mail
is RFC 822.
- Router
- A special-purpose computer
(or software package) that handles the connection
between 2 or more networks. Routers spend all
their time looking at the destination addresses of the packets
passing through them and deciding which route to send
them on.
See Also: Network
, Packet
Switching
- Security
Certificate
- A chunk of information
(often stored as a text file) that is used by the SSL
protocol to establish a secure connection.
Security Certificates contain information about who it
belongs to, who it was issued by, a unique serial number
or other unique identification, valid dates, and an
encrypted “fingerprint” that can be used to verify
the contents of the certificate.
In order for an SSL connection to be created both sides
must have a valid Security Certificate.
See Also: Certificate
Authority , SSL
- Server
- A computer, or a software
package, that provides a specific kind of service to client
software running on other computers. The term can refer
to a particular piece of software, such as a WWW
server, or to the machine on which the software is
running, e.g.Our mail server is down today, that’s why
e-mail isn’t getting out. A single server machine
could have several different server software packages
running on it, thus providing many different servers to clients
on the network.
See Also: Client
, Network
- SLIP
- (Serial Line Internet
Protocol) -- A standard for using a regular telephone
line (a serial line) and a modem to connect a
computer as a real Internet site. SLIP is
gradually being replaced by PPP.
See Also: Internet
, PPP
- SMDS
- (Switched Multimegabit
Data Service) -- A new standard for very high-speed data
transfer.
- SMTP
- (Simple Mail Transfer
Protocol) -- The main protocol used to send electronic
mail on the Internet.
SMTP consists of a set of rules for how a program
sending mail and a program receiving mail should
interact.
Almost all Internet email is sent and received by clients
and servers using SMTP, thus if one wanted to set
up an email server on the Internet one would look for
email server software that supports SMTP.
See Also: Client
, Server
- SNMP
- (Simple Network Management
Protocol) -- A set of standards for communication with
devices connected to a TCP/IP network. Examples
of these devices include routers, hubs, and
switches.
A device is said to be “SNMP compatible” if it can
be monitored and/or controlled using SNMP messages. SNMP
messages are known as “PDU’s” - Protocol Data
Units.
Devices that are SNMP compatible contain SNMP
“agent” software to receive, send, and act upon SNMP
messages.
Software for managing devices via SNMP are available for
every kind of commonly used computer and are often
bundled along with the device they are designed to
manage. Some SNMP software is designed to handle a wide
variety of devices.
See Also: Network
, Router
- Spam
(or Spamming)
- An inappropriate attempt
to use a mailing list, or USENET or other
networked communications facility as if it was a
broadcast medium (which it is not) by sending the same
message to a large number of people who didn’t ask for
it. The term probably comes from a famous Monty Python
skit which featured the word spam repeated over and
over. The term may also have come from someone’s low
opinion of the food product with the same name, which is
generally perceived as a generic content-free waste of
resources. (Spam is a registered trademark of Hormel
Corporation, for its processed meat product.)
E.g. Mary spammed 50 USENET groups by posting the same
message to each.
See Also: Maillist
, USENET
- SQL
- (Structured Query
Language) -- A specialized programming language for
sending queries to databases. Most industrial-strength
and many smaller database applications can be addressed
using SQL. Each specific application will have its own
version of SQL implementing features unique to that
application, but all SQL-capable databases support a
common subset of SQL.
- SSL
- (Secure Sockets Layer) --
A protocol designed by Netscape Communications to enable
encrypted, authenticated communications across the
Internet.
SSL used mostly (but not exclusively) in communications
between web browsers and web servers. URL’s
that begin with “https” indicate that an SSL
connection will be used.
SSL provides 3 important things: Privacy,
Authentication, and Message Integrity.
In an SSL connection each side of the connection must
have a Security Certificate, which each side’s
software sends to the other. Each side then encrypts
what it sends using information from both its own and
the other side’s Certificate, ensuring that only the
intended recipient can de-crypt it, and that the other
side can be sure the data came from the place it claims
to have come from, and that the message has not been
tampered with.
See Also: Browser
, Server
, Security
Certificate , URL
- Sysop
- (System Operator) --
Anyone responsible for the physical operations of a
computer system or network resource. A System
Administrator decides how often backups and maintenance
should be performed and the System Operator performs
those tasks.
- 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. That is still
not fast enough for full-screen, full-motion video, for
which you need at least 10,000,000 bits-per-second. T-1
is the fastest speed commonly used to connect networks
to the Internet.
See Also: Bandwidth
, Bit
, Byte
, Ethernet
, T-3
- T-3
- A leased-line
connection capable of carrying data at 44,736,000
bits-per-second. This is more than enough to do
full-screen, full-motion video.
See Also: Bandwidth
, Bit
, Byte
, Ethernet
, T-1
- TCP/IP
- (Transmission Control
Protocol/Internet Protocol) -- This is the suite of
protocols that defines the Internet. Originally
designed for the UNIX operating system, TCP/IP
software is now available for every major kind of
computer operating system. To be truly on the Internet,
your computer must have TCP/IP software.
See Also: IP
Number , Internet
, UNIX
- 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.
See Also: Byte
, Kilobyte
- 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.
See Also: LAN
, Modem
, Host
, Node
, PPP
, SLIP
- 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: TCP/IP
- UNIX
- A computer operating
system (the basic software running on a computer,
underneath things like word processors and
spreadsheets). 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.
- 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
(WWW). A URL looks like this:
http://www.matisse.net/seminars.html
or telnet://well.sf.ca.us
or news:new.newusers.questions
etc.
The most common way to use a URL is to enter into a WWW
browser program, such as Netscape, or Lynx.
See Also: Browser
, WWW
- 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, maybe half. USENET is completely
decentralized, with over 10,000 discussion areas, called
newsgroups.
See Also: Newsgroup
- 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 e-mail.
See Also: Binhex
, MIME
- Veronica
- (Very Easy Rodent Oriented
Net-wide Index to Computerized Archives) -- Developed at
the University of Nevada, Veronica is a constantly
updated database of the names of almost every menu item
on thousands of gopher servers. The Veronica
database can be searched from most major gopher
menus.
See Also: Gopher
- 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.
A typical example would
be a company network where there are two offices in
different cities. Using the Internet the two offices
mereg their networks into one network, but encrypt
traffic that uses the Internet link.
See Also: Internet,
Network
- WAIS
- (Wide Area Information
Servers) -- A commercial software package that allows
the indexing of huge quantities of information, and then
making those indices searchable across networks
such as the Internet. A prominent feature of WAIS
is that the search results are ranked (scored) according
to how relevant the hits are, and that subsequent
searches can find more stuff like that last batch and
thus refine the search process.
- WAN
- (Wide Area Network) -- Any
internet or network that covers an area
larger than a single building or campus.
See Also: Internet
, internet
, LAN
, Network
- Web
-
See: WWW
- WWW
- (World Wide Web) --
Frequently used (incorrectly) when referring to
"The Internet", WWW has two major meanings -
First, loosely used: the whole constellation of
resources that can be accessed using Gopher, FTP,
HTTP, telnet, USENET, WAIS and some other tools.
Second, the universe of hypertext servers (HTTP
servers) which are the servers that allow text,
graphics, sound files, etc. to be mixed together.
See Also: Browser
, FTP
, Gopher
, HTTP
, Internet
, Telnet
, URL
, WAIS
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The Richmond Virtual Village is a web site by JPCohen. Copyright ©
jpcohen publishing & jpcohen enterprises.
All other copyrights are that of their owners and we stake no claims
to them. Contact me at joe.cohen@rvv.com.
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