Telecommunications

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Chapter 7 Telecommunications
The Uses of Online Resources the Internet
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Panel 7.1aThe world of connectivity
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The Uses of Communications Connectivity

• Telephone-Related Communications Services
• Video/Voice Communication
• Online Information Services
• The Internet
• The World Wide Web
• Shared Resources

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II. Telephone-Related Communications Services

• Fax Messages
• Dedicated fax machines
• Fax boards
• Voice Mail

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III. Video/Voice Communication

• Videoconferencing
• Picture Phones

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IV. Online Information Services

• 1. e-mail, bulletin boards, chat rooms
• 2. Research and news
• 3. Games, entertainment, and clubs
• 4. Free software
• 5. Travel services
• 6. Shopping
• 7. Financial management

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V. The Internet

• A. Connecting to the Internet1. Through school
  or work2. Through online information
  services3. Through ISPs
• B. Internet Addresses

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The Internet
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Panel 7.4What an Internet address means
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V. Internet

• C. Features of the Internet
• 1. E-mail2. Usenet newsgroups 3. Mailing
  lists4. FTP transfer files b/w
  computers5. Telnetconnect to remote computers

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VI. The World Wide Web

• A. The Web A Working Vocabulary1. HTMLHypertext
  Markup Language
• 2. http//Hypertext Transfer Protocol3. Web
  siteslocations of hyperlinked documents4. Web
  pageshypertext documents5. Web
  browsers6. URLUniform Resource Locator

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Meaning of a URL address
An example of a URL is that for DebJens Land
O Useless Facts, which consists of bizarre
trivia submitted by readers.
Http//www-leland.stanford.edu/jenkg/useless.html
The http// is the protocol for Web pages
The fourth partuseless.htmlis the document
name it identifies the Web page.
The second partwww-leland.stanford.edu/ is the
domain name, it identifies the computer (which
here is at Leland Stanford Junior University,
usually known as just Stanford University) that
stores the Web pages.
The third partjenkg/is the directory path it
identifies where the Web page is stored on the
computer.
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VI. The World Wide Web

• C. What are on the Web1. Directories2. Search
  engines
• D. Browser Add-Ons for Multimedia Plug-Ins
• E. Designing Web Pages

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VII. Shared Resources

• A. Workgroup Computing Groupware
• B. Electronic Data Interchange (EDI)
• C. Intranets Firewalls1. Proxy
  server2. Caching
• D. Extranets

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Panel 7.10Internet telephony how it works
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Emoticons