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The document describes how internet search engines work through crawling web pages with spiders or crawlers, indexing the downloaded content with software tools, searching the indexed database of web pages to return results to users, and storing indexed data in databases for easy retrieval through search queries.
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Crawlers retrieve web pages and indexing software generates indexes of keywords and their locations. These indexes and pages are stored in databases for search engines to search through. Search engines allow users to input queries and return relevant results by matching queries to information in indexes and databases.
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A web crawler is a program that systematically browses websites to index them. It gathers information from web pages using spiders, which are specialized crawlers. The spiders pass retrieved data to applications that index the content and build searchable databases from keywords and terms. When a user searches online, the search engine checks its database of indexed web pages to return relevant results.
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Notes for
This document discusses different types of search engines. It explains that crawler-based search engines like Google automatically find and index web pages using software programs called crawlers or spiders. When pages change, it can take time for those changes to be reflected in the search engine's index. The document also describes human-powered directories that rely on human-submitted descriptions instead of automated crawling. It provides details on the three main parts of a crawler-based search engine: the crawler, index, and search software.
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When you search using an internet search engine like Google, search engines have databases filled with web pages that have been crawled by robots. The robots gather information from web servers and analyze the content to create searchable indexes. Search engines return results differently, with some only showing URLs or snippets of text. There are two main types of search engines - robot-driven search engines that use robots to automatically crawl and index websites, and directory search engines that are manually constructed but only contain a limited number of sites. Users can search for websites, products, videos, maps and more using keywords or search terms.
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- Google uses a web crawling robot called Googlebot to access websites, follow links, and send data back to Google's servers. This data is processed into a database where pages are analyzed and indexed.
- When a user searches Google, their search terms are processed by Google's query processor which examines over 200 signals, including PageRank, to determine the overall importance and relevance of pages to the search terms. The most relevant results are displayed first.
- Google runs on thousands of low-cost computers distributed in a network which allows for fast parallel processing of search queries and results. This parallel processing improves the speed of data processing for user searches.
Important Terms Related to the World Wide Web
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A web crawler is a program that systematically browses websites to index them. It gathers information from web pages using spiders, which are specialized crawlers. The spiders pass retrieved data to applications that index the content and build searchable databases from keywords and terms. When a user searches online, the search engine checks its database of indexed web pages to return relevant results.
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When you search using an internet search engine like Google, search engines have databases filled with web pages that have been crawled by robots. The robots gather information from web servers and analyze the content to create searchable indexes. Search engines return results differently, with some only showing URLs or snippets of text. There are two main types of search engines - robot-driven search engines that use robots to automatically crawl and index websites, and directory search engines that are manually constructed but only contain a limited number of sites. Users can search for websites, products, videos, maps and more using keywords or search terms.
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- 1. How Internet Search Engines Work
- 4. Search Engine The aimed Web page is searched out on the Web page with an innumerable it is in the Internet and drinking on the Web page to be providing the retrieval service.
- 5. Database The one which you collected data along the specific theme and you managed it, and it was possible for by reuse such as a search the extraction easily.
- 6. LINK Google Image Search http;//www.google.co.jp