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CGS 1000

CGS 1000. Introduction to Computers and Technology Spring 2007. Chapter 2. The Internet and World Wide Web. Topics Covered. Definition of homepage, downloading, URL, hyperlink, search engine, subject directory Types of websites Guidelines for evaluating the value of a website.

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CGS 1000

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  1. CGS 1000 Introduction to Computers and Technology Spring 2007 Discovering Computers Fundamentals, Third Edition

  2. Chapter 2 The Internet and World Wide Web Discovering Computers Fundamentals, Third Edition

  3. Topics Covered • Definition of • homepage, • downloading, • URL, • hyperlink, • search engine, • subject directory • Types of websites • Guidelines for evaluating the value of a website Discovering Computers Fundamentals, Third Edition

  4. The World Wide Web • Multimedia: • Application integrating text with other elements like: • Graphics, • Animation, • Audio, • Video, • Virtual reality • Plug-ins Discovering Computers Fundamentals, Third Edition

  5. The World Wide Web • Graphic: • Digital representation of non-text information such as drawing, chart, photograph. Different formats: • JPEG: (Joint Photographic Experts Group) .jpg, .jpeg, .jpe, .jfif • GIF: (Graphics Interchange Format) .gif works best for images with few distinct colors. • Thumbnail: small version of a larger image used to improve web page display time. Discovering Computers Fundamentals, Third Edition

  6. The World Wide Web • Animation: • Appearance of motion created by displaying a series of still images in sequence. • Audio: • Music, speech, or any other sound • Individual compressed sound files that you download from the Web to your computer • Common Web audio file formats are AA, AAC, AIFF, ASF, MP3, WAV, WMA, RA, and QT Discovering Computers Fundamentals, Third Edition

  7. The World Wide Web • Streaming Audio: • Transfers data in a continuous and even flow. • Enables you to listen to the sound as it downloads to your computer • Radio stations use streaming audio to broadcast over the Web Discovering Computers Fundamentals, Third Edition

  8. The World Wide Web • Video: • Consists of full-motion images with soundplayed back at various speeds • MPEG (Moving Pictures Experts Group) is popular video compression standard Discovering Computers Fundamentals, Third Edition

  9. The World Wide Web • Virtual Reality: • Use of computers to simulate real or imagined environment • Appears as a three dimensional (3-D) space • Used for games and many practical applications Discovering Computers Fundamentals, Third Edition

  10. The World Wide Web • Plug-ins: • Programs that extend the capability of a browser • You can download many plug-ins at no cost from various Web sites Discovering Computers Fundamentals, Third Edition

  11. Step 2.Analyze and design the Web site Step 1.Plan the Web site Step 3.Create the Web site Step 5.Maintain the Web site Step 4.Deploy the Web site Web Publishing Discovering Computers Fundamentals, Third Edition

  12. E-Commerce • Electronic Commerce • Business transaction that occurs over the Internet • 3 types: • B2C (Business-to-consumer) • C2C (Consumer-to-consumer) • B2B (Business-to-business) Discovering Computers Fundamentals, Third Edition

  13. E-Commerce • B2C • Sale of goods & services to general public • E.g.: Dell • C2C • One consumer sells directly to another. • Online auction • E.g.: eBay • B2B • Businesses provide goods & services to other businesses • Online advertising, recruiting, training Discovering Computers Fundamentals, Third Edition

  14. Other internet services • Email • Electronic mail • The transmission of messages and files via a computer network • Messages can consist of simple text or can contain attachments, such as documents, graphics, or audio/video clips • Internet access providers usually provide an e-mail program Discovering Computers Fundamentals, Third Edition

  15. Step 1.Using e-mail software, you create and send message Step 2.Your software contacts software on your ISP’s outgoing mail server Step 4.When recipient uses e-mail software to check for e-mail messages, the message transfers from incoming mail server to recipient’s computer Step 3.Software on outgoing mail server determines best route for data and sends message, which travels along Internet routers to recipient’s incoming mail server How does an e-mail message travel? Discovering Computers Fundamentals, Third Edition

  16. Other internet services • FTP • File Transfer Protocol • Internet standard that permits you to upload and download files with other computers on the Internet • Newsgroup • Online area where users discuss a particular subject • Message Boards • Web based discussion group Discovering Computers Fundamentals, Third Edition

  17. Other internet services • Mailing List • Group of e-mail addresses given a single name • When a message is sent to the mailing list, everyone on the list receives the message • Chat • Real-time typed conversation that takes place on a computer • Chat room is location on server that permits users to discuss topics of interest Discovering Computers Fundamentals, Third Edition

  18. Other internet services • Instant Messaging • A real-time Internet communications service that notifies you when one or more people are online and allows you to exchange messages or files • Internet Telephony • Enables users to speak to other users over the Internet using their computer Discovering Computers Fundamentals, Third Edition

  19. Netiquette • Internet etiquette • Code of acceptable behaviors users should follow while on the Internet • Golden Rule: Treat others as you would like them to treat you. Discovering Computers Fundamentals, Third Edition

  20. Chapter Summary History and structure of the Internet Newsgroups and Message Boards Chat Rooms and Instant Messaging The World Wide Web Internet Telephony E-Mail FTP Netiquette Discovering Computers Fundamentals, Third Edition

  21. Questions? Discovering Computers Fundamentals, Third Edition

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