In this lesson, we’re going to discuss the Internet.
We’ll cover how the Internet has created a new business model that’s
changing how companies do business today. We’ll look at intranets, extranets,
and e-commerce. Finally, we’ll look at the technology implications of the
new Internet applications such as the need for higher bandwidth technologies and
- What Is the Internet?
- The New Business
- Technology Implications
of Internet Applications
The Internet: A Network of Networks
What is the Internet? The Internet is the following:
- A flock of independent networks flying in loose formation,
owned by no one and connecting an unknown number
- A grass roots cultural phenomenon started 30 years ago
by a group of graduate students in tie-dyed shirts
- Ma Bell’s good old telephone networks dressed up
for the 1990s
A new way to transmit information that is faster
and cheaper than a phone call, fax, or the post office
Some Internet facts:
- The number of hosts (or computers) connected to the Internet
has grown from a handful in 1989 to hundreds of
- The MIT Media Lab says that the size of the World Wide
Web is doubling every 50 days, and that a new home
page is created every 4 seconds.
The Internet has three components: information, wires, and
- The “wires” are arranged in a loose hierarchy,
with the fastest wires located in the middle of the cloud
on one of the Internet’s many “backbones.”
- Regional networks connect to the Internet backbone at
one of several Network Access Points (NAPs), including
MAE-EAST, in Herndon, Virginia; and MAE-WEST, in Palo Alto, California.
- Internet service providers (ISPs) administer or connect
to the regional networks, and serve customers from
one or more points of presence (POPs).
- Dynamic adaptive routing allows Internet traffic to be
automatically rerouted around circuit failures.
- Dataquest estimates that up to 88 percent of all traffic
on the Internet touches a Cisco router at some point.