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Intro to MIS – MGS351 The World Wide Web and the Internet. Extended Learning Module B. Chapter Overview. What is the Internet? Overview of various Internet Services How does the Internet work? The World Wide Web Security and the Internet Intranets and Extranets

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Intro to mis mgs351 the world wide web and the internet

Intro to MIS – MGS351The World Wide Weband the Internet

Extended Learning Module B


Chapter overview
Chapter Overview

  • What is the Internet?

    • Overview of various Internet Services

  • How does the Internet work?

  • The World Wide Web

  • Security and the Internet

  • Intranets and Extranets

  • Future directions of the Internet


Intro to mis mgs351 the world wide web and the internet

“The Internet is one of the rare, if not unique, instances where ‘hype’ is accompanied by understatement, not overstatement…I don’t think we know what has hit us.”

Nicholas Negroponte, Director, MIT Media Lab


What is the internet
What is the Internet? where ‘hype’ is accompanied by understatement, not overstatement…I don’t think we know what has hit us.”

  • Two or more networks joined together (i)

  • Worldwide group of connected networks that allow public access to information and services (I)

  • No central governing body

  • Estimated 2.4 billion users

    • Roughly 34.3% of the world population


Internet statistics hosts
Internet Statistics - Hosts where ‘hype’ is accompanied by understatement, not overstatement…I don’t think we know what has hit us.”


Brief history of the internet
Brief History of the Internet where ‘hype’ is accompanied by understatement, not overstatement…I don’t think we know what has hit us.”

  • 1969 - Network of four University computers (ARPANET)

  • 1984 - Domain Name System introduced

  • 1986 - NSFnet connects to ARPANET

  • 1988 - Internet WORM affects 6,000 hosts

  • 1991 - Gopher and WWW released

  • 1993 - Mosaic is released

  • Various organizations help define standards


Internet services
Internet Services where ‘hype’ is accompanied by understatement, not overstatement…I don’t think we know what has hit us.”

  • World Wide Web

  • E-mail

  • FTP (Archie)

  • Telnet

  • Chat Rooms (IRC)

  • Usenet

  • Gopher (Veronica and Jughead)


How does the internet work
How does the Internet work? where ‘hype’ is accompanied by understatement, not overstatement…I don’t think we know what has hit us.”

  • Clients

  • Web Servers (www.netcraft.com)

  • Packets

  • Routers

  • Packet Switching (TCP / IP)

  • Backbone

  • Network Access Point (NAP)


Internet addresses
Internet Addresses where ‘hype’ is accompanied by understatement, not overstatement…I don’t think we know what has hit us.”

  • IP (Internet protocol) address

    • 128.205.4.175

  • Domain name

    • www.buffalo.edu

  • Domain Name System (DNS)

  • Domain name servers

    nslookup <hostname> in Windows

    host <hostname> in UNIX


Top level domains

com where ‘hype’ is accompanied by understatement, not overstatement…I don’t think we know what has hit us.”

coop

edu

gov

mil

net

org

int

info

biz

museum

name

pro

Top Level Domains


World wide web
World Wide Web where ‘hype’ is accompanied by understatement, not overstatement…I don’t think we know what has hit us.”

  • CERN – Where the Web was born

    • public.web.cern.ch/public/en/About/Web-en.html

    • Tim Berners-Lee

    • Hyperlinked documents

    • Defined URL’s, HTML, and HTTP

    • Designed for collaborative research


Anatomy of a web page
Anatomy of a Web Page where ‘hype’ is accompanied by understatement, not overstatement…I don’t think we know what has hit us.”

  • Uniform Resource Locator (URL)

  • Hypertext transfer protocol (http://)

  • Hypertext markup language (HTML)

  • Hyperlinks

    • Hypertext & Hypermedia


Uniform resource locator
Uniform Resource Locator where ‘hype’ is accompanied by understatement, not overstatement…I don’t think we know what has hit us.”


Web page do s and don ts
Web Page Do’s and Don’ts where ‘hype’ is accompanied by understatement, not overstatement…I don’t think we know what has hit us.”

  • Keep your pages small

  • Limit graphics on pages to keep them “light”

  • Reuse graphics and avoid animations

  • Balance images and text

  • Test...test...test…

  • Know your customer


Security on the internet
Security on the Internet where ‘hype’ is accompanied by understatement, not overstatement…I don’t think we know what has hit us.”

  • CERT - www.cert.org

    • 1988 1 advisory and 6 incidents

    • 2003 28 advisories, 137,529 incidents and 3,784 vulnerabilities

  • Hackers, Phishing, Denial of Service, Worms, Viruses, Social Engineering, Fraud, Identity Theft


Security solutions
Security Solutions where ‘hype’ is accompanied by understatement, not overstatement…I don’t think we know what has hit us.”

  • Authentication / Authorization

  • Firewalls

  • Intrusion Detection Systems

  • Data Encryption

  • Secure Sockets Layer (SSL)

  • Security Awareness Training & Education


Intranets b2e
Intranets (B2E) where ‘hype’ is accompanied by understatement, not overstatement…I don’t think we know what has hit us.”

“Private corporate network that uses Internet technology and is designed to meet the needs of employees”


Extranets b2b
Extranets (B2B) where ‘hype’ is accompanied by understatement, not overstatement…I don’t think we know what has hit us.”

“Private corporate network designed to meet the needs of external parties such as suppliers, customers, and stockholders”


The internet and business
The Internet and Business where ‘hype’ is accompanied by understatement, not overstatement…I don’t think we know what has hit us.”

  • 24 / 7 access

  • Global presence

  • Lower marketing costs

  • Two-way communications

  • Lower product display and storage costs

  • Lower salesperson costs

  • Electronic commerce opportunities


Future directions
Future Directions where ‘hype’ is accompanied by understatement, not overstatement…I don’t think we know what has hit us.”

  •  Electronic commerce

  •  Bandwidth

  •  Social media applications

  • VOIP

  • IPv6 - 340 undecillion versus 4.3 billion 340,000,000,000,000,000,000,000,000,000,000,000,000

  • Ubiquitous Access (wireless/mobile)