The Internet, Intranets, and Extranets

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The Internet, Intranets, and Extranets

• Chapter 7

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Learning Objectives

• Define how the Internet works
• Describe the services associated with the
  Internet
• Describe the World Wide Web
• Define the terms intranet and extranet and
  discuss how organizations use them

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Learning Objectives

• Identify who is using the Web to conduct business
• Discuss some pros and cons of Web shopping
• Identify several issues associated with the use
  of networks

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Learning Objectives

• Outline a process for creating web pages
• Describe Java and its potential impact on the
  software world

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Use and Functioning of the Internet
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Use and Functioning of the Internet

• Fig 7.1

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Use and Functioning of the Internet

• Interconnected networks
• Global though US is the largest user
• Internet Protocol (IP)
• Research for a faster Internet
• Internet2 (I2)
• Next Generation Internet (NGI)
• Corporate efforts

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How the Internet Works

• Hosts
• Routers forward packets to other networks
• Internet Protocol Stack (TCP/IP)
• Internet Protocol (IP)
• Transport Control Protocol (TCP)
• Backbones

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How the Internet Works

• Uniform Resource Locator (URL)
• http//www.whitehouse.gov

World Wide Web
Domain category
Hypertext transfer protocol
Host Network Name
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Table 7.1
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Accessing the Internet

• Fig 7.2

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Internet Service Providers (ISPs)

• Provide Internet access to account holders
• Monthly fee varies
• Some are free

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Table 7.2
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Internet Services
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Table 7.3
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Internet Services

• E-mail (Electronic mail)
• Can include images, attachments, or HTML
• Routed by gateways and routers
• Telnet remote login
• FTP file transfer

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Internet Services

• Table 7.4

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Internet Services

• Chat rooms allow interactive conversations
• Instant Messaging online, real-time
  communication over the Internet
• Videoconferencing
• Internet phone

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Table 7.5
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Internet Services

• Content streaming transfers multimedia files
  continuously so users can view them in real-time
• Music, radio video
• 3-D Internet sites

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Internet Services

• Shopping on the Web
• Bots web search tools
• Web Auctions
• Office on the web

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The World Wide Web
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Fig 7.4
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Web Software

• Web browsers
• Search engines
• Keyword indexes fast broad
• Subject indexes focused searches

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Table 7.7
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Figure 7.5
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Webcasting

• aka Push Technology
• Consolidates information according to a users
  profile displays in the browser

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Developing Web Content

• Tools
• Word processors
• HTML editor
• HTML Template
• Text editor
• View your page
• Add effects judiciously

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Intranets and Extranets
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Table 7.8
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Fig 7.7
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Net Issues
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Net Issues

• Service bottlenecks
• Firewalls
• Privacy security
• Cookies
• Cryptography
• Encryption
• Digital signature

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Fig 7.8