Transcript Lecture 3
Technology In Action © 2006 Prentice-Hall, Inc. NEXT SLIDE 1 Technology In Action Chapter 3 Technology In Action Chapter 3 Using the Internet: Making the Most of the Web’s Resources © 2006 Prentice-Hall, Inc. NEXT SLIDE 2 Technology In Action Chapter 3 Chapter 3 (P.1) review • What is the origin of the Internet? • How does data travel on the Internet? – Client/Server – Pathway: Internet Backbone – IP address • What are my options for connecting to the Internet? – – – – Dial-up DSL Cable Satellite © 2006 Prentice-Hall, Inc. NEXT SLIDE 3 Technology In Action Chapter 3 Chapter 3 (P.1) Review • How do I choose an Internet service provider? – Cost – quality of service – availability • What is a Web browser? • What is a URL and what are its parts? – http://www.kent.edu/academics © 2006 Prentice-Hall, Inc. NEXT SLIDE 4 Technology In Action Chapter 3 Chapter 3 (P.1) Review • How can I use hyperlinks and other tools to get around the Web – Hyperlink – – – – Back/foreward History list Breadcrumb list Favorites and bookmarks © 2006 Prentice-Hall, Inc. NEXT SLIDE 5 Technology In Action Chapter 3 More Topics • • • • • Search engines and subject directories Internet communications E-commerce Internet multimedia The Internet’s future © 2006 Prentice-Hall, Inc. NEXT SLIDE 6 Technology In Action Chapter 3 Hyperlinks • Provide access to other Web pages • Specially coded text or graphics • Cursor becomes a hand with finger pointing upward © 2006 Prentice-Hall, Inc. NEXT SLIDE 7 Technology In Action Chapter 3 Awful website • www.webpagesthatsuck.com © 2006 Prentice-Hall, Inc. 8 Technology In Action Chapter 3 Favorites and Bookmarks • • • • List created of favorite Web pages Easy method of returning to Web pages Internet Explorer uses Favorites Netscape uses Bookmarks Netscape Navigator © 2006 Prentice-Hall, Inc. Internet Explorer NEXT SLIDE 9 Technology In Action Chapter 3 Search Engines and Subject Directories Search Engines • Searches for keywords • Returns a list of Web pages • Popular search engines: – Google – Alltheweb – Dogpile © 2006 Prentice-Hall, Inc. Subject Directories • Web pages organized by topics and subtopics • Popular subjct directories: – Yahoo – Looksmart – MSN NEXT SLIDE 10 Technology In Action Chapter 3 Search Engine • Spider • Indexer • Search engine software © 2006 Prentice-Hall, Inc. 11 Technology In Action Chapter 3 Meta search engine • www.metasearch.com • www.dogpile.com © 2006 Prentice-Hall, Inc. 12 Technology In Action Chapter 3 Boolean Operators • Words or symbols that help refine searches • AND • OR • NOT • Exact phrase • Wildcards © 2006 Prentice-Hall, Inc. 13 Technology In Action Chapter 3 When to use • Narrow topic / broad topic • Looking for a specific site • See a list of sites recommended by experts • Want a large number of documents to choose from • Want to avoid sorting through low-content documents © 2006 Prentice-Hall, Inc. 14 Technology In Action Chapter 3 Evaluating Web Sites • Who is the author of the article or Web site sponsor? • What audience is the site geared toward? • Is the site biased? • Is the information current? • Are links available? © 2006 Prentice-Hall, Inc. NEXT SLIDE 15 Technology In Action Chapter 3 Communicating Through the Internet • • • • • E-mail Weblogs Chat rooms Instant messaging Newsgroups © 2006 Prentice-Hall, Inc. NEXT SLIDE 16 Technology In Action Chapter 3 E-mail • Electronic mail • Primary means of communication • E-mail accounts – Client-based – Web-based • Spam – Prevention © 2006 Prentice-Hall, Inc. NEXT SLIDE 17 Technology In Action Chapter 3 Avoiding spam • • • • • • • • • • Don’t volunteer to receive email Don’t give email to anyone unless you know them Don’t publish email on website Keep multiple email addresses Don’t respond to unsolicited email Never ask to be removed from a spammer’s list Never buy anything from spammer Using a second email when posting newsgroups Use spam filter … © 2006 Prentice-Hall, Inc. 18 Technology In Action Chapter 3 Weblogs • Known as blogs • Personal logs or journal entries posted on the Web • Available to the public © 2006 Prentice-Hall, Inc. NEXT SLIDE 19 Technology In Action Chapter 3 Chat Rooms • Real time text based conversations • Rooms focus on specific topics or interests • Identity protection – Username © 2006 Prentice-Hall, Inc. NEXT SLIDE 20 Technology In Action Chapter 3 Instant Messaging • Real time text based conversations • Set up a list of contacts – Buddy list • Contacts must be online • AOL Instant Messenger © 2006 Prentice-Hall, Inc. NEXT SLIDE 21 Technology In Action Chapter 3 Newsgroups • Online discussion forums • Post and reply to messages © 2006 Prentice-Hall, Inc. NEXT SLIDE 22 Technology In Action Chapter 3 Conducting Business Over the Internet • E-Commerce: – – – – – Electronic commerce Business-to-consumer (B2C) Business-to-business (B2B) Consumer-to-consumer (C2C) Secure transactions B2B E-commerce Suppliers Manufacturer © 2006 Prentice-Hall, Inc. Retailer NEXT SLIDE 23 Technology In Action Chapter 3 security • Security certification • Security icon • URL changes from http:// to https:// • Shop safely © 2006 Prentice-Hall, Inc. 24 Technology In Action Chapter 3 Cookies • Text files stored on client computers when visiting Web sites • Used on return visits to Web sites • Unique ID number • Personal information remembered • Privacy risk – Selling information © 2006 Prentice-Hall, Inc. NEXT SLIDE 25 Technology In Action Chapter 3 Web Entertainment • Multimedia: – Involves forms of media and text Graphics Audio Video – Streaming audio and video – Plug-in • Games © 2006 Prentice-Hall, Inc. NEXT SLIDE 26 Technology In Action Chapter 3 Popular plug-ins © 2006 Prentice-Hall, Inc. 27 Technology In Action Chapter 3 Future of the Internet • Large Scale Networking (LSN): – Research and development of cutting-edge networking and wireless technologies • Internet2: – Project sponsored by universities, government, and industry to develop new Internet technologies – Transmission speed of 9.6Gbps © 2006 Prentice-Hall, Inc. NEXT SLIDE 28 Technology In Action Chapter 3 An Interplanetary Internet © 2006 Prentice-Hall, Inc. NEXT SLIDE 29 Technology In Action Chapter 3 Expanding features of internet • • • • Sense Smell Taste Household systems © 2006 Prentice-Hall, Inc. 30 Technology In Action Chapter 3 Chapter 3 Summary Questions • What is the origin of the Internet? • How does data travel on the Internet? • What are my options for connecting to the Internet? • How do I choose an Internet service provider? • What is a Web browser? © 2006 Prentice-Hall, Inc. NEXT SLIDE 31 Technology In Action Chapter 3 Chapter 3 Summary Questions • What is a URL and what are its parts? • How can I use hyperlinks and other tools to get around the Web? • How do I search the Internet using search engines and subject directories? • How can I communicate through the Internet? • What is e-commerce © 2006 Prentice-Hall, Inc. NEXT SLIDE 32 Technology In Action Chapter 3 Chapter 3 Summary Questions • What are cookies? • What are the various kinds of Multimedia? • What does the Internet of the future look like? © 2006 Prentice-Hall, Inc. LAST SLIDE 33