Internet Glossary - I
An image that contains more than one hyperlink on a Web page. Clicking on different parts of the image links the user to other resources on another part of the Web page, a different Web page, or a file. Often an image map, which can be a photograph, drawing, or a composite of several different drawings or photographs, is used as a map to the resources found on a particular Web site.
An advertisement's (usually a banner ad) appearance on a web page. For example, if the page you're on shows five ads, that's five impressions. Ad space is often sold on a cost per thousand (CPM) basis.
A link from an external domain to a web site. Inbound links are used to measure link popularity.
Internet Service Provider
An organization that provides access to the Internet.
The invisible web (or deep web or hidden web) is the name given to pages on the World Wide Web that are not indexed by search engines. It consists of pages which are not linked to by other pages, such as password-protected content on the Web available only to members and subscribers.