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The Internet and the World Wide Web

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1992 Internet Society formed. 1993 NCSA Mosaic GUI for WWW. 1995 NSFNET decomissioned ... IP address is a number that signifies the address of an Internet host ... – PowerPoint PPT presentation

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Title: The Internet and the World Wide Web


1
The Internet and the World Wide Web
2
What is the Internet?
  • A Short History
  • The Internet Today
  • How the Internet Works
  • Basic Internet Applications
  • Specialized Apps

3
What is the Internet? and Not
On-Line Providers
Dialup Access to Providers Computer Systems
Gateways
7 Million Computers Seamlessly Integrated via
60,000 Largely Private Networks
Gateways
UUCP Nets, FidoNets, BitNets, X400,...
4
A Short History of the Internet
  • 1964Paul Baran (RAND Corp.) proposes a
    loosely-coupled, robust network
  • 1969ARPANET formed as a four-node network (UCLA,
    SRI, UCSB, and U of Utah-Salt Lake City)
  • 1974Kahn and Cerf head TCP/IP project
  • 1980CSNET added to ARPANET
  • 1986NSF forms NSFNET

5
A Short History of the Internet
  • 1987NSFNET backbone expands the Internet
    worldwide
  • 1989CERN launches WWW project
  • 1990ARPANET decommissioned
  • 1992Internet Society formed
  • 1993NCSA Mosaic GUI for WWW
  • 1995NSFNET decomissioned

6
The Internet Today
Connectivity Worldwide
7
The Internet Today
124 Million Internet Hosts
124 Million Internet Hosts
hosts
hosts
NOW
Historical Values
Historical Values
Projected Values
Projected Values
8
How is the Internet Used?
IRC
DNS
1
APPLICATIONS
2
Gopher
3
Telnet
  • FTP is the top application (based on packets
    transferred)
  • WWW is a close second

3
Mail
1,075 Other
5
Services
29
NewsNet
9
WWW
20
FileTransfer
28
9
How is the Internet Used?
  • information sharing
  • global collaboration
  • distance education
  • software distribution
  • scientific research
  • product development
  • public service
  • marketing sales
  • customer support
  • professional development
  • entertainment

some of its many uses...
10
How the Internet Works
  • Internet is a packet-switched network
  • DATAGRAMs are packets of data that also contain
    addressing information
  • TCP/IP are protocols (standards) for how
    datagrams are packaged and delivered
  • IP address is a number that signifies the address
    of an Internet host
  • Domain names are pseudonyms for IP addresses

11
How the Internet Works
  • Gateways and Routers transmit datagrams across
    the Internet
  • Client/Server applications add functionality to
    the Internet

12
Basic Internet Applications
  • ELECTRONIC MAIL (EMAIL)asynchronous
    communications
  • mail client
  • mail server

13
Basic Internet Applications
  • REMOTE LOGINS (TELNET)synchronous 2-way
    communications
  • local host
  • remote host

14
Basic Internet Applications
  • FILE TRANSFER PROTOCOL (FTP)exchanging data and
    programs between systems
  • anonymous ftp

15
Specialized Internet Apps
  • ARCHIEsearching anonymous ftp servers for files
    by name
  • GOPHERorganizing data and connections as
    hypertext
  • CHATlive group conversations
  • MUDs MOOsgroup interactions in a virtual
    environment
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