Professor Nancy C' Shaw

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Internet Basics

• Professor Nancy C. Shaw

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Agenda

• History of the Internet
• How the Internet works
• What the Internet looks like

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Define these terms

• Web Site
• WWW
• Internet
• Browser
• Cyberspace
• URL
• HTTP
• HTML

• Web Servers
• Web Clients
• ISP
• FTP
• Search Engines

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Internet

• The most well known and the largest
  internetworking implementation
• It is a network of networks
• No one owns it
• No formal management organization
• Facilitates electronic commerce

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Evolution of the Internet

• ARPANet Advanced Research Projects Agency
• US Defense Department.
• Scientists, military personnel, and researchers.
• MILNet Military personnel
• Bitnet National Science Foundation

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Five Waves of Internet Technology Use

• Department of Defense funding Research
  Applications
• Academic Use
• Web and Web browsers
• Telecommunications infrastructure
• Mobile Internet platforms

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How does the internet work?
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Internet BasicsThe Client / Server Model

• Both the data and the processing power are
  distributed out into the net rather then being
  centrally controlled
• Client
• the entry point into the system (PC, laptop)
• Server
• satisfies some or all of the users request for
  data and/or processing

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Degrees of Client / Server

• Thick Client
• desktop (client) has most/all of the data and
  performs most/all of the processing
• Thin Client
• desktop (client) does little (if any) processing
  and contains little (if any) data
• a dumb terminal

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Peer-to-Peer Networks

• Peer-to-peer networks - enable networked
  computers to function as both servers and
  workstations

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Internet Basics

• Internet addressing
• URL uniform resource locator
• Protocol//domain-nameport/directory/filename
• http//www.healthyway.com/exercise/mtbike.html
• IP Address
• 152.17.101.11
• Domain Name System, translates the URL into an IP
  address.
• Domain Name suffixes (.edu, com, .gov, .biz,
  .name, etc).

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Internet Basics

• World Wide Web (WWW) is a subset of the Internet
  used to store and retrieve hypertext and
  hypermedia files.
• HTML, hypertext markup language is a set of tags
  that markup documents to be viewed in a web
  browser.
• A web browser is a software program that is used
  to view web pages (Netscape Navigator, Microsoft
  Internet Explorer).
• A web server is hardware and software used to
  store web pages (IIS, Apache)

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Internet Basics Push vs. Pull

• Pull technology
• Most common model, older
• You choose what sites you want to visit, and what
  information you want to display (pull)
• Push technology
• Newer model
• Internet sites send (push) the information to you
  via e-mail or portal sites

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What happens when I view a Web Site?
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What does the Internet look like?
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http//www.uu.net/network/maps/
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What can you do on the Internet?