Podcast
Questions and Answers
What is the primary function of spiders in search engines?
What is the primary function of spiders in search engines?
- To index the words on a website (correct)
- To maintain search engines
- To follow links from one page to another
- To ask questions on behalf of users
What is a characteristic of search engines?
What is a characteristic of search engines?
- They cover the entire World Wide Web
- They only index specific websites
- They differ in what they cover (correct)
- They ask questions on behalf of users
What is the purpose of a search engine's database?
What is the purpose of a search engine's database?
- To store user queries
- To sell advertising space
- To index the words on websites (correct)
- To connect users to the internet
What do spiders use to move from one website to another?
What do spiders use to move from one website to another?
What type of software program is used to compile search engine databases?
What type of software program is used to compile search engine databases?
What is a common name for a spider in the context of search engines?
What is a common name for a spider in the context of search engines?
What do search engines use to retrieve information from the World Wide Web?
What do search engines use to retrieve information from the World Wide Web?
What is the result of a spider's activity on a website?
What is the result of a spider's activity on a website?
What type of search engines compile their own searchable databases on the web?
What type of search engines compile their own searchable databases on the web?
What is a characteristic of Individual Search Engines?
What is a characteristic of Individual Search Engines?
What type of search tool is maintained by human editors?
What type of search tool is maintained by human editors?
Which of the following is an example of a Subject Directory?
Which of the following is an example of a Subject Directory?
What is the primary difference between Individual Search Engines and Subject Directories?
What is the primary difference between Individual Search Engines and Subject Directories?
What is an advantage of using a Subject Directory?
What is an advantage of using a Subject Directory?
Which of the following is NOT a characteristic of Individual Search Engines?
Which of the following is NOT a characteristic of Individual Search Engines?
What do Individual Search Engines use to create their databases?
What do Individual Search Engines use to create their databases?
What is the primary function of push technology?
What is the primary function of push technology?
What is the purpose of RSS newsreaders?
What is the purpose of RSS newsreaders?
What is XML, and what is its purpose?
What is XML, and what is its purpose?
What is the primary purpose of webcasting?
What is the primary purpose of webcasting?
What are blogs, and what are they used for?
What are blogs, and what are they used for?
What is the relationship between XML and RSS?
What is the relationship between XML and RSS?
What is the result of the combination of XML and RSS?
What is the result of the combination of XML and RSS?
What is the purpose of using RSS aggregators?
What is the purpose of using RSS aggregators?
Study Notes
Search Services and Search Engines
- Search services maintain search engines, which are programs that users can use to ask questions or search for information using keywords.
- Search engines are compiled using software programs called spiders, also known as crawlers, bots, or agents.
- Spiders crawl through the World Wide Web, following links from one page to another, indexing the words on each site.
- A search never covers the entire web, and search engines differ in what they cover.
Search Engines and Databases
- Individual search engines compile their own searchable databases on the web.
- Users search by typing keywords and receiving "hits".
- Examples of search engines include Ask, Bing, Google, and Yahoo!.
Subject Directories
- Subject directories are created and maintained by human editors, not electronic spiders.
- They allow users to search for information by selecting lists of categories or topics.
- Example sites include Beaucoup!, LookSmart, Open Directory Project, and Yahoo! Directory.
Push Technology and Webcasting
- Push technology is software that automatically downloads information to personal computers.
- Webcasting involves sending users customized text, video, audio on a regular basis.
RSS Newsreaders and Blogs
- RSS newsreaders (RSS aggregators) are programs that scour the web and pull together "feeds" from several websites.
- RSS is based on XML, or extensible markup language, a web-document tagging and formatting language.
- XML and RSS have led to the development of blogs and the blogosphere.
- Blogs are frequently updated sites on the web intended for public consumption that contain a writer's observations, opinions, images, and links to other websites.
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Description
Learn about search services and how they work, including Google, Bing, and Ask.com. Understand how search engines use software programs to compile databases.
