1 / 28

Internet & World Wide Web

Chapter 2. Internet & World Wide Web. Overview. Discuss the Evolution of the Internet Understand IP Addresses & URLs Describe the Purpose of a Browser Identify Different Internet Services Identify the Rules of Netiquette. The Internet. Worldwide Collection of Networks Links Millions of:

rey
Download Presentation

Internet & World Wide Web

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Chapter 2 Internet & World Wide Web

  2. Overview • Discuss the Evolution of the Internet • Understand IP Addresses & URLs • Describe the Purpose of a Browser • Identify Different Internet Services • Identify the Rules of Netiquette

  3. The Internet • Worldwide Collection of Networks • Links Millions of: • Businesses • Government Agencies • Educational Institutions • Individuals

  4. Internet Services • World Wide Web • E-mail • File Transfer • Newsgroups • Message Board • Chat • Instant Messaging

  5. History of the Internet • Origination • Originated as ARPANET in Sept 1969 • Goals • Allow Scientists in Different Places to Collaborate • Function Even if Part of Network Disabled • Renamed Internet in the Late 1980s • World Wide Web Proposed In 1989 • Tim Berners-Lee

  6. Today More than 550 million hosts 1984 More than 1,000 hosts 1969 4 hosts History of the Internet • Growth

  7. History of the Internet • Control • Organizations Responsible for Own Network • World Wide Web Consortium (W3C) • Tim Berners-Lee, Director • Oversees Research • Sets Standards & Guidelines

  8. Internet Mechanics • Access Providers • ISP (Internet Service Provider) • Regional • Provide Access to Specific Geographical Area • National • Provide Access in Cities & Towns Nationwide • OSP (Online Service Provider) • Member-only Features • e.g., Comcast • WISP (Wireless Internet Service Provider)

  9. Internet Mechanics • Addressing • IP (Internet Protocol) Address • Identifies Each Device Connected to Internet • Unique Number • 2.7/3.7 Billion Used • Run Out in 2012 • IPv6 = 3.4 x 1038 v. 232 • Domain Name • Text Version of IP Address

  10. Internet Mechanics • Addressing • TLD (Top Level Domain) • Identifies Type of Organization • ccTLD • Two-letter Country Code Outside US • ICANN Assigns & Controls TLDs • DNS (Domain Name System) • DNS Server • Translates Domain Name to IP Address

  11. Internet Mechanics

  12. World Wide Web • Collection of Electronic Documents • Each Document is Called a Web Page • Contains Text, Graphics, Sound, Video • Contains Links to Other Pages • Web Site • Collection of Related Web Pages • Web 2.0 • Sites Providing Ways for Visitor Interaction

  13. World Wide Web • Web Browser • Program that Allows Access to Web Pages • Netscape • Internet Explorer • Spent $1.25 B • Mozilla • Firefox • Safari • Chrome • Microbrowser • Mobile Devices

  14. World Wide Web • Browser Mechanics

  15. World Wide Web • Web Addressing • URL (Uniform Resource Locator) • Unique Address for Page Located on Server

  16. World Wide Web • Searching • Search Engine • Search for Word / Phrase • AKA Keyword • Spider / Crawler / Bot • Algorithm Ranks Keyword Relevance • Subject Directory • Organized by Topics / Subtopics

  17. World Wide Web • Content • Must be Evaluated for Accuracy • No One Oversees Web Page Content

  18. World Wide Web • Multimedia • Graphics • GIF, JPG, PNG • Audio • MP3, WAV • Compression to 1/10 Original Size • Streaming • Transfers Data in Continuous & Even Flow • Podcast

  19. World Wide Web • Multimedia • Video • MPG, AVI, MOV, WMV • Vodcast • VR (Virtual Reality) • Simulate Three-dimensional Environment • Second Life, There

  20. E-commerce • Business Transaction Using Internet • M-commerce • Mobile Device Used for Transaction • Business-to-Consumer (B2C) • Sale of Goods to General Public • Business-to-Business (B2B) • Business Sells to Other Businesses • Consumer-to-Consumer (C2C) • Consumer Sells Directly to Another

  21. E-commerce • Mechanics

  22. Other Services • E-mail • Transmission of Messages Over Internet • Messages May Include Attachments • Files, Graphics, Audio, Video • Virus • Volume • 1.4 Billion Active Accounts Worldwide • 90 Trillion E-mails Sent in 2009 • 81% Spam royalpingdom.com 1/10

  23. Other Services • Instant Messaging (IM) • Real-time Typed Conversation • Indicate Who You Want to Speak With • Notified When They Are Online • Chat • Real-time Typed Conversation • Discuss Topics of Interest • Chat Room • Location on Server that Permits Discussion

  24. Other Services • FTP (File Transfer Protocol) • Allows Upload / Download of Files • Files Located on FTP Servers • Use FTP Client Program to Access • Mailing List • Topical E-mail Discussion Group • You Must Subscribe to a Mailing List • E-mail Sent to Listserv • Listserv Distributes E-mail to All Subscribers

  25. Other Services • Newsgroup • User Sends Message to Newsgroup • Others in Newsgroup Read / Reply • Read with Newsreader Program • Message Board • AKA Discussion Board, Forum • Web-based Version of Newsgroup • Newsreader not Required

  26. Other Services • VoIP (Voice over IP) • AKA Internet Telephony • Voice Communication Over Internet • Replaces Standard Telephone Service • Comcast • Vonage

  27. Netiquette • Code of Acceptable Behavior

  28. Netiquette • Cyberbullying • Online Threats or Offensive Behavior • 34% Targeted in Last Year • 13-year-old Commits Suicide (10/06) • Unwanted Sexual Experiences • 18% Reported Internet Victimization • 10% Reported Texting Victimization cyberbully411.com 2010 is4k.com 4/10

More Related