IAB
Internet Advertising Bureau. The organisation that defines the standards for advertising on the Internet (among others things, the size of banners).

ICANN
Internet Corporation for Assigned Names and Numbers. The organisation in charge of world-wide domain and commercial names management on the Internet.

ICMP
Internet Control Message Protocol. Protocol from the IP layer for generating error, test and information messages about transmission through the network.

Illustrator
Vector drawing software from Adobe.

Image Map
Enables the definition of hypertext links based on sections of an image.

Interlaced GIF
Enables the progressive display of an image, so that it appears to gradually fade in.

InterNIC
Internet Network Information Center. A service providing information on domain names registration services (.com, .net and .org), responsibility of which is assumed by ICANN.

Intranet
A private company network based on Internet technologies: Web, e-mail, etc. When accessed from outside, it becomes an extranet.

IP
Internet Protocol. The protocol that handles the delivery of packets on TCP/IP networks.

IP (Internet Protocol) Address
Every computer on the Internet is identified by a numeric address (for example: 188.147.6.90). Each IP address has a corresponding DNS address (for example: www.xyz.com).