The internet and the world wide web
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The Internet and the World Wide Web PowerPoint PPT Presentation

The Internet and the World Wide Web. What is the Internet?. A Short History The Internet Today How the Internet Works Basic Internet Applications Specialized Apps. What is the Internet? and Not. On-Line Providers. Dialup Access to Providers’ Computer Systems. Gateways.

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The Internet and the World Wide Web

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The internet and the world wide web

The Internet and the World Wide Web


What is the internet

What is the Internet?

  • A Short History

  • The Internet Today

  • How the Internet Works

  • Basic Internet Applications

  • Specialized Apps


What is the internet

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,...


A short history of the internet

A Short History of the Internet

  • 1964—Paul Baran (RAND Corp.) proposes a loosely-coupled, robust network

  • 1969—ARPANET formed as a four-node network (UCLA, SRI, UCSB, and U of Utah-Salt Lake City)

  • 1974—Kahn and Cerf head TCP/IP project

  • 1980—CSNET added to ARPANET

  • 1986—NSF forms NSFNET


A short history of the internet1

A Short History of the Internet

  • 1987—NSFNET “backbone” expands the Internet worldwide

  • 1989—CERN launches WWW project

  • 1990—ARPANET decommissioned

  • 1992—Internet Society formed

  • 1993—NCSA Mosaic GUI for WWW

  • 1995—NSFNET decomissioned


The internet today

The Internet Today

Connectivity Worldwide


The internet today1

The Internet Today

124 Million

Internet Hosts

124 Million

Internet Hosts

hosts

hosts

NOW

Historical

Values

Historical

Values

Projected Values

Projected

Values


How is the internet used

How is the Internet Used?

IRC

DNS

1%

APPLICATIONS

2%

Gopher

  • FTP is the top application (based on packets transferred)

  • WWW is a close second

3%

Telnet

3%

Mail

1,075 Other

5%

Services

29%

NewsNet

9%

WWW

20%

FileTransfer

28%


How is the internet used1

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 it’s many uses...


How the internet works

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


How the internet works1

How the Internet Works

  • Gateways and Routers transmit datagrams across the Internet

  • Client/Server applications add functionality to the Internet


Basic internet applications

Basic Internet Applications

  • ELECTRONIC MAIL (EMAIL)asynchronous communications

    • mail client

    • mail server


Basic internet applications1

Basic Internet Applications

  • REMOTE LOGINS (TELNET)—synchronous 2-way communications

    • local host

    • remote host


Basic internet applications2

Basic Internet Applications

  • FILE TRANSFER PROTOCOL (FTP)—exchanging data and programs between systems

    • anonymous ftp


Specialized internet apps

Specialized Internet Apps

  • ARCHIE—searching anonymous ftp servers for files by name

  • GOPHER—organizing data and connections as hypertext

  • CHAT—“live” group conversations

  • MUDs & MOOs—group interactions in a virtual environment


  • Login