Ch 3. The Internet and World Wide Web

1
Ch 3. The Internet and World Wide Web

• Origins of the Internet
• Key Technologies
• Internet Protocols
• The Structure of the Internet
• Limitations of the Internet
• Capabilities of Internet II
• How the WWW works
• Support Services

2
The Origins of the Internet

• Three Phases
• Phase I Innovation (1961-1974) link nationwide
• Phase II Institutional (1975-1995), the
  Internets purpose was to lin

3
Key Technologies

• Packet Switching
• TCP/IP. TCP establishes the connections and IP
  provides the addresses.
• Client/Server technology

4
The Internet Protocols and Utility Programs

• HTTP delivers web pages
• STMP and POP enable e-mail
• IMAP enables e-mail to be sorted
• FTP is used to transfer files
• SSL ensure the transmissions encrypted

• Telnet enables remote work
• Finger Finds out who is logged onto a remote
  network
• Ping allows users to verify a connection
• Tracer lets you track the route a message takes

5
Structure of the Internet

• The backbone high-bandwidth fiber optic cable
• NAPs and MAEs
• Campus area networks
• Internet Service Providers

6
Limitations of the Internet

• Bandwidth
• Quality of Service
• Network architecture
• HTML

7
Capabilities of Internet II

• Advanced network infrastructure
• New networking capabilities
• Middleware
• Advanced audio and video applications
• IP multicasting
• Latency solutions

• Guaranteed service levels
• Lower error rates
• Declining costs
• Access anywhere and anytime from mobile hand-held
  devices

8
How the WWW Works

• Hypertext
• HTTP
• URLs
• HTML
• XML
• Web server software
• Web clients
• Web browsers

9
E-commerce Support Services

• E-mail
• Search engines
• Software robots or intelligent agent
• Instant messaging
• Chat
• Music, video, photos, etc.
• Streaming media

• Cookies
• Internet telephoney
• Digital libraries
• Distributed storage
• Distance learning and video conference
• Digital video networks
• High quality video teleconferencing
• Tele-immersion
• M-commerce applications