Transcript ch-3-FIT-pt1

3
chapter
The Basics of Networking, Part 1
Part 1: Impact of Networks
NETWORKED COMPUTERS
CHANGE OUR LIVES
> Nowhere Is Remote
> People Are More Interconnected
> Social Interactions Are Changing
> English Is Becoming a Universal Language
> Freedom of Speech and of Assembly
Have Expanded
Slide 3-2
Web 1.0 Analogy
by Philip Greenspun, photo.net.
The computer is the steam engine.
The network is the railroad.
Slide 3-3
Web 2.0 Analogy:
universal virtual computer
Tim O'Reilly is the founder and CEO of O'Reilly
Media, Inc.
applications revolve around the network as the
planets revolve around the Sun
universal virtual computer,
the web as operating system.
Cloud Computing:
Web 2.0
Office 2.0
Slide 3-4
The Internet
The Internet:
global network of computer networks that
transmit data by packet switching using
the Internet Protocol (IP)
Slide 3-5
Figure 3.1. A diagram of the
Internet.
Slide 3-6
The Internet
Birth of the Internet: 4 node ARPAnet 1969
Internet Growth Rates
“the fastest growing technology ever
developed”
As of September 30, 2007, 1.244 billion
people use the Internet according to
Internet World Stats
 Internet Domain Survey Host Count
Slide 3-7
The Internet
 A packet-switched (asynchronous) network using
the TCP/IP protocol?
 Or “a drunk librarian”?
The ability of TCP/IP to work over preexisting communication systems allowed for rapid
growth
Use of the term "Internet" to describe a
single global TCP/IP network originated around the
1990s.
Slide 3-8
Summary, Part 1
Impact of Networks
> People are more interconnected
—networks support distributed workgroups
— ideally: democratic; decentralized
— support freedom of speech, assembly
— the Internet should function as a Web,
rather than a hierarchy
 World Wide Web
Next: How networks move bits
Slide 3-9