meant to aid people find information saved on other sites. There are differences in the methods several Search Engines operate, but they all perform three basic tasks:
They search the Internet – or select pieces of the Internet – based on important words,
They keep an index of the words they discover, and where they find them, and
They give permission to users to look for words or combinations of words found in that index.
The first Search Engines held an index of a few hundred thousand pages and documents Cheap Philadelphia Eagles Jerseys , and got maybe one or two thousand inquiries each day. Today, a top Search Engine will index hundreds of millions of pages, and give answers to tens of millions of queries per day.
Before a Search Engine can brief you where a file or document is, it must be located. To come up with information on the hundreds of millions of Web pages that exist, a Search Engine employs special software robots, called spiders Cheap Oakland Raiders Jerseys , to build lists of the words located on Web sites.
When a spider is building its lists, the procedure is called web crawling.
In order to build and manage an useful list of words, a SE’s spiders have to look at a lot of pages. How does any spider begin its travels over the Web? The usual starting points are lists of heavily used servers and very well-liked pages. The spider will begin with a familiar site, indexing the words on its pages and following every link found within the site. In this way, the spidering system quickly begins to travel, spreading out across the most widely used portions of the Web.
As soon as the spiders have finished the job or chore of finding intelligence on Web pages Cheap New York Jets Jerseys , the Search Engine must manage the information in a way that makes it useful. There are two