How Internet Serch Engins Work
- 1. How Internet Search Engins Work s1160214 s1160217 s1160218 s1160225
- 2. What are Search Engines ? ● The Search Engine is a web-page which srevices gethering infometion you want. ● There are famillier search engine sites on the world wide web, Google, Yahoo, FAST Search, and so on.
- 3. Serch engine keeps a clawler or spider? When Serch engines finds your word, it uses a fanction like clawler or spider with its own rules. ● They follow every link on every home page they find, and then, in turn, examine every link on new home page. ● But some of them, which are clawers or spiders, ignore certain type of link, graphics files, sound failes and animationfiles.
- 4. Spiders have a character ! ● Some spider ignore links to certain Internet resorces, such as news groups. ● But some spider are instructed to look primarily for the most populer home pages. Serch Engines give the character for spiders featuring the engine defined.
- 5. The relationship the database and spiders ● Documents and URLs discoverd by spider, are odered using index softwere and put and save in the search engines database. ● Each search engines extracts and indexing different types of infomation. The kind of index built determines how the infomation will be desplayed.
- 6. And then, what is happen in searching ? When you want to serch, first you should type the words on search engines text area that describe the infomation you want to find. Next databese is searchd based on the criteria you've set the keywords. And databese return the result as HTML pages. Finaly, when you click the link to one of the documents on the HTML pages, you are sent that document saved in another database by linking system.