JianYing Xiao

What is the Internet?

Is the largest computer network in the world

Actually a network of networksConnecting billions of computer users

The Internet PrecursorARPANET

Began in the 1950s and developed in the 1960s

Under the aegis of the Advanced Research Projects Agency in the U.S. Department of Defense

The Federal Government required reliable communication channels between the nodes of the proposed network

Internet History

Internet Growth Trends1977: 111 hosts on Internet1981: 213 hosts1983: 562 hosts1984: 1,000 hosts1986: 5,000 hosts1987: 10,000 hosts1989: 100,000 hosts1992: 1,000,000 hosts2001: 150 – 175 million hosts2002: over 200 million hosts

The Speeds of the Internet ConnectivityFrom 300 bps modem in 1984 to 16 Mbps cable modem in 2008

Internet Users Growth

Today the Internet continues to grow day by day , the following graph shows the incredibly fast evolution of the Internet from 1995 till the present time.

Internet Users Growth TrendsBy the end of 2005, nearly 70% of homes in the

U.S. were connected to the Internet, a number that grows each day.

By 2010, about 80% of the planet will be on the Internet

Nearly 150 countries have some

form of connection to the Internet.

The reason for people to use the Internet

CommunicationE-Mail, Instant Messaging,

Weblogs, podcasts, chatrooms, newsgroups

Shopping onlineSearching for informationBrowsing the Internet for fun

ResourceNielsen, Jakob. (1998, April 05) Nielsen’s Law of

Internet Bandwidth. Retrieved February 4, 2009, from http://www.useit.com/alertbox/980405.html

Internet World Stats. Internet Growth Statistics. Retrieved February 4, 2009, from http://www.internetworldstats.com/emarketing.htm

SunTechies, Inc. Internet Timeline. Retrieved February 4, 2009, from http://www.k12.hi.us/~telecom/Images/timeline.gif