Transcript Ch 3. The Internet and World Wide Web

Ch 3. The Internet and World Wide
Web
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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
The Origins of the Internet
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Three Phases
Phase I Innovation (1961-1974) link nationwide
Phase II Institutional (1975-1995), the Internet’s
purpose was to lin
Key Technologies
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Packet Switching
TCP/IP. TCP establishes the connections and
IP provides the addresses.
Client/Server technology
The Internet Protocols and Utility
Programs
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HTTP delivers web pages
STMP and POP enable email
IMAP enables e-mail to be
sorted
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FTP is used to transfer files
SSL ensure the transmissions
encrypted
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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
Structure of the Internet
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The backbone – high-bandwidth fiber optic
cable
NAPs and MAEs
Campus area networks
Internet Service Providers
Limitations of the Internet
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Bandwidth
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Quality of Service
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Network architecture
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HTML
Capabilities of Internet II
Advanced network
infrastructure
New networking
capabilities
Middleware
Advanced audio and video
applications
IP multicasting
Latency solutions
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Guaranteed service levels
Lower error rates
Declining costs
Access anywhere and
anytime from mobile
hand-held devices
How the WWW Works
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Hypertext
HTTP
URLs
HTML
XML
Web server software
Web clients
Web browsers
E-commerce Support Services
E-mail
Search engines
Software robots or intelligent
agent
Instant messaging
Chat
Music, video, photos, etc.
Streaming media
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Cookies
Internet telephoney
Digital libraries
Distributed storage
Distance learning and video
conference
Digital video networks
High quality video
teleconferencing
Tele-immersion
M-commerce applications