Chapter 5 The Internet and the World Wide Web

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Chapter 5The Internet and the World Wide Web
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The Internet

• The evolution of the Internet
• Connection to the Internet
• LAN gateway
• internet service provider
• Addresses and domain names
• domain name server
• IP address

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Connections and the Internet
Figure 5.1 Connections and the Internet
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Connection Through the Internet

• Packet switching
• TCP/IP
• internet protocol
• transmission control protocol
• Point-to-point protocol

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Internet connection
(a)
(b)
Figure 5.3 (a) A virtual network connection
(produced by NeoTrace) (b) Nodes used to
establish the network connection Source McAffee
www.mcaffee.com
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Internet connection (Continued)
(c)
Figure 5.3 (c) NeoTrace Version 3.25 trial
trace results Source McAffee www.mcaffee.com
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What The Internet offers

• E-mail
• WWW
• TELNET
• FTP
• Instant messaging
• Telephony/conferencing
• Collaborative working tools

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The World Wide Web

• HTML
• SGML, XML

Figure 5.8 Markup languages
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The World Wide Web (Continued)

• Web browsers
• HTTP
• Uniform Resource Locators
• Web search engines
• Plug-ins
• Java
• Organizational control of the Internet

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The Internet and Financial Transactions

• Electronic credit card transactions
• Electronic cash
• Electronic cash substitutes
• Security and electronic payments

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Intranets and extranets

• Intranet construction
• firewall
• Intranet usage
• Extranet construction
• virtual private network