invisible Web(n.) Also referred to as the deep Web, the term refers to either Web pages that cannot be indexed by a typical search engine or Web pages that a search engine purposely does not index, rendering the data "invisible" to the general user. One of the most common reasons that a Web site��s content is not indexed is because of the site��s use of dynamic databases, which opens the door for a potential spider trap. Web pages can also fall into the invisible Web if there are no links leading to them, since search engine spiders typically crawl through links that lead them from one destination to another. Data on the invisible Web is not inaccessible; the information is out there-it is stored on a Web server somewhere and can be accessed using a browser-but the data must be found using means other than the general-purpose search engines, such as Google and Yahoo!.
Stay up to date on the latest developments in Internet terminology with a free weekly newsletter from Webopedia. Join to subscribe now.
From wacky alarm clocks to lecture hall tools and after class entertainment, these Android apps are a good fit for a student's life and budget. Read More »Sharing Threat Intelligence
A growing number of startups make the sharing of threat intelligence a key part of their solutions. Read More »Smiley Faces and Symbols
A text smiley face is used to convey a facial expression or emotion in texting and online chat conversations. This Webopedia guide shows you how... Read More »
The Open System Interconnection (OSI) model defines a networking framework to implement protocols in seven layers. Use this handy guide to compare... Read More »Network Fundamentals Study Guide
Networking fundamentals teaches the building blocks of modern network design. Learn different types of networks, concepts, architecture and... Read More »Computer Architecture Study Guide
This Webopedia study guide describes the different parts of a computer system and their relations. Read More »