JianYing Xiao
What is the Internet?
 Is the largest computer network in the
world
 Actually a network of networks
 Connecting billions of computer users
The Internet Precursor
 ARPANET
 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 Trends
 1977: 111 hosts on Internet
 1981: 213 hosts
 1983: 562 hosts
 1984: 1,000 hosts
 1986: 5,000 hosts
 1987: 10,000 hosts
 1989: 100,000 hosts
 1992: 1,000,000 hosts
 2001: 150 – 175 million hosts
 2002: over 200 million hosts
The Speeds of the Internet Connectivity
From 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 Trends
 By 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
 Communication
 E-Mail, Instant Messaging,
Weblogs, podcasts, chatrooms,
newsgroups
 Shopping online
 Searching for information
 Browsing the Internet for fun
Resource
 Nielsen, 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.h
tm
 SunTechies, Inc. Internet Timeline. Retrieved February
4, 2009, from
http://www.k12.hi.us/~telecom/Images/timeline.
gif