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A Web crawler, sometimes called a spider or spiderbot and often shortened to crawler, is an Internet bot that systematically browses the World Wide Web and that is typically operated by search engines for the purpose of Web indexing (web spidering).
Amaurobius ferox is known to spin a cribellate web to facilitate prey capture and provide a protective retreat. [2] The web is special because the silk has a unique woolly texture that is caused by extremely thin and extraordinarily sticky fibers, which gives the species its common-name, the black lace-weaver.
A spider trap (or crawler trap) is a set of web pages that may intentionally or unintentionally be used to cause a web crawler or search bot to make an infinite number of requests or cause a poorly constructed crawler to crash. Web crawlers are also called web spiders, from which the name is derived. Spider traps may be created to "catch ...
robots.txt is the filename used for implementing the Robots Exclusion Protocol, a standard used by websites to indicate to visiting web crawlers and other web robots which portions of the website they are allowed to visit. The standard, developed in 1994, relies on voluntary compliance.
A classic circular form spider's web Infographic illustrating the process of constructing an orb web. A spider web, spiderweb, spider's web, or cobweb (from the archaic word coppe, meaning 'spider') [1] is a structure created by a spider out of proteinaceous spider silk extruded from its spinnerets, generally meant to catch its prey.
WebCrawler was highly successful early on. [15] At one point, it was unusable during peak times due to server overload. [16] It was the second most visited website on the internet in February 1996, but it quickly dropped below rival search engines and directories such as Yahoo!, Infoseek, Lycos, and Excite in 1997.
Not only persons browsing the document may follow hyperlinks. These hyperlinks may also be followed automatically by programs. A program that traverses the hypertext, following each hyperlink and gathering all the retrieved documents is known as a Web spider or crawler.
Pisaurina mira, also known as the American nursery web spider, due to the web it raises young in, is a species of spider in the family Pisauridae. They are often mistaken for wolf spiders due to their physical resemblance. P. mira is distinguished by its unique eye arrangement of two rows.