I

Image file formats are standardized means of organizing and storing digital images. Image files are composed of either pixel or vector (geometric) data that are rasterized to pixels when displayed (with few exceptions) in a vector graphic display. The pixels that constitute an image are ordered as a grid (columns and rows); each pixel consists of numbers representing magnitudes of brightness and color.
common image formats for the web
PNG - supports transparency and translucency. good for graphics
JPG - Best for photos images with shadings , files suffer generational degradation when repeatedly edited and saved.
gif - best for graphics - images with large color fields supports transparency, animitated gifs



IMAGE MAP
In HTML and XHTML , an image map is a list of coordinates relating to a specific image, created in order to hyperlink areas of the image to various destinations (as opposed to a normal image link, in which the entire area of the image links to a single destination). For example, a map of the world may have each country hyperlinked to further information about that country. The intention of an image map is to provide an easy way of linking various parts of an image without dividing the image into separate image files


Internet
The "information superhighway" that is made possible by standard Transmission Control Protocols/Internet Protocols (TCP/IP). Originally developed for the U.S. military in 1969, it grew to include educational and research institutions. With the advent of Netscape Navigator, the arcane commands formerly used to access the Internet became unnecessary. The Internet includes the World Wide Web, Usenet user groups and newsgroups.
IMAP4 (Internet Message Access Protocol Version 4)
A network standard that allows users to manage email messages and folders from multiple locations and systems. Users can choose to store their messages on their own local computer (or client), or on a server.
ISP (Internet Service Provider)
A company or organization that lets users connect to the Internet by dialing into its computers using a modem. ISPs typically charge a fee for providing a dial-up telephone number, an email address, and some technical assistance (usually via email). Also called an IPP. See also online service.
IP (Internet Protocol) Address
An IP address is a number that identifies a particular server or user on the Internet. These numbers consist of four set of numbers between 0 and 255 such as 123.45.67.8 and are the basis for any transfer of information over the Internet.
Intranet
A computer network that functions like the Internet using web browser software to access and process the information that employees need, but the information and web pages are located on computers within a company. A firewall is usually used to block access from outside the Intranet.
IPP (Internet Presence Provider)
A company that allows individuals or other companies to use their server space to host web sites. Nearly every ISP is an IPP, so you don't hear this term very often.


IAB
The abbreviation for Internet Architecture Board, the IAB is the council that makes decisions about Internet standards.
IETF
The abbreviation for Internet Engineering Task Force, IETF refers to a subgroup of the Internet Architecture Board that focuses on solving technical problems on the Internet.
Inline Images
These are the graphics contained within a Web document.
IP
The abbreviation for Internet Protocol, IP refers to the set of communication standards that control communications activity on the Internet. An IP address is the number assigned to any Internet-connected computer.
ISDN
The abbreviation for Integrated Services Digital Network, ISDN is a telecommunications standard that uses digital transmission technology to support voice, video and data communications applications over regular telephone lines.
ISOC
This is the abbreviation for Internet Society, an organization formed to support a worldwide information network. ISOC is the sponsoring body of the Internet Architecture Board.




IAB (Internet Architecture Board)
A council that makes decisions about Internet standards. (See also W3C).

IE (Internet Explorer)
See Internet Explorer.

IETF (Internet Engineering Task Force)
A subgroup of IAB that focuses on solving technical problems on the Internet.

IIS (Internet Information Server)
A web server for Windows operating systems. Developed by Microsoft.

IMAP (Internet Message Access Protocol)
A standard communication protocol for retrieving e-mails from an e-mail server. IMAP is much like POP but more advanced.
Learn more about IMAP in our TCP/IP tutorial

Indeo
A codec for computer video developed by Intel.

Internet
A world wide network connecting millions of computers. (See also WWW)

Internet Browser
See Web Browser.

Internet Explorer
A browser by Microsoft. The most commonly used browser today.
Learn more about browsers in our browser section

Internet Server
See Web Server

Intranet
A private (closed) Internet, running inside a LAN (Local Area Network).

IP (Internet Protocol)
See TCP/IP.

IP Address (Internet Protocol Address)
A unique number identifying every computer on the Internet (like 197.123.22.240)

IP Number (Internet Protocol Number)
Same as an IP address.

IP Packet
See TCP/IP Packet.

IRC (Internet Relay Chat)
An Internet system that enables users to take part in on-line discussions.

IRC Client
A computer program that enables a user to connect to IRC.

IRC Server
An Internet server dedicated to the task of serving IRC connections.

ISAPI (Internet Server API)
Application Programming Interface (See API) for Internet Information Server (See IIS).

ISDN (Integrated Services Digital Network)
A telecommunication standard that uses digital transmission to support data communications over regular telephone lines.

ISP (Internet Service Provider)
Someone that provides access to the Internet and web hosting.


INTRANET
The term is used in contrast to internet, a network between organizations, and instead refers to a network within an organization

ISP
An Internet service provider (ISP), also sometimes referred to as an Internet access provider (IAP), is a company that offers its customers access to the Internet




IEEE

(Institute of Electrical and Electronics Engineers). Organization that ensures that electronic devices produced by different companies can interoperate. IEEE developed the 802 family of standards that govern computer networks.

IIS

Microsoft Internet Information Server. Microsoft's Web server that comes built-in with Windows NT Server 4 and Windows 2000 server. Here is Microsoft's IIS web site.

Image Map

An image displayed on the webpage that has different areas that are hyperlinks. By clicking on different parts of the image browser can be redirected to another webpage, or can display modified version of the current one.

IMAP

Internet Message Access Protocol. A method allowing a client email program to access remote messages stored on a mail server. The protocol includes operations for creating, deleting, and renaming mailboxes, checking for new messages, message parsing, searching, and setting and clearing flags. IMAP was originally developed in 1986 at Stanford.

IMHO

In My Humble Opinion (or: In My Honest Opinion)

IMO

In My Opinion

Internet

Not to be confused with internet (with lowercase i). The word Internet refers to all the computer networks worldwide that are connected together. TCP/IP is the de facto standard protocol set for Internet.

Internet backbone

An extremely fast network that connects major cities. Most often it utilizes T3 circuits and provides the bandwidth of 45Mbps.

Internet Group Management Protocol (IGMP)

A network control protocol running on top of the IP protocol. It is used by Internet hosts to maintain information related to multicast. All machines that want to use the multicast have to have the IGMP implemented.

InterNIC

The organization that handles domain name registrations. See http://www.internic.net/

Intranet

A part of an organization's network that is private. Only authorized individuals have access to the intranet. Besides that an intranet is very similar to the Internet in a sense that it offers the same services and uses the same protocols.

IP

(Internet Protocol) is tha main protocol used on the Internet.

IP Address

Internet Protocol Address. A unique number identifying all devices connected to the Internet. This number is usually shown in groups of numbers from 0 to 255, separated by periods, for example 207.46.230.218.

IP packet

IP packet is the basic data chunk that can be sent over the Internet. All the data is partitioned into IP packets on the sending computer and reassembled on the receiving computer.

IPX

Internet Packet Exchange. A Novell's proprietary network protocol.

IRC

Internet Relay Chat. Multi-user chat service. IRC users can go into public or private channels to discuss a topic or transfer files. IRC servers are connected into networks. The most popular IRC client program is mIRC. Many hosts are vary of letting customers access IRC because of a possibility of a denial of service attack on the whole network.

ISDN

(Integrated Services Digital Network). An international standard that governs the transmission of both voice and data. It uses a digital circuits and has speed of 64Kbps. It can be used for normal telephone service as well as data transmission.

ISO

(International Organisation for Standardisation). An Geneva-based international organization that develops and publishes various international standards.

ISP

Internet Service Provider. A company that provides its subscribers with Internet access. Customers have a username and a password and can dial-up or use a cable or DSL line to connect to ISP's network which is connected to the Internet. The biggest ISP is AOL.

ITU

(International Telecommunication Union). (Formerly CCITT). Another international standards body concerned with telecommunications.