The document discusses the history and technology of the Internet. It began as a project by ARPA and the U.S. Department of Defense in 1983 to develop protocols like TCP/IP to connect heterogeneous networks. The Internet is a global system of interconnected computer networks that use standards like TCP/IP to serve billions of users worldwide. It uses protocols like IP to provide addressing and enable internetworking between millions of private, public, academic, business and government networks. Internet service providers and routing hierarchies allow networks and users to connect globally through peering agreements and transit. The Internet is now tied to over 160 countries and considered the prototype of the future global information highway.

1. Internet
20108004
Rui Zeng

2. Directory
What’s the Internet
History of the Internet
The technology about Internet
The importance of Internet
Reference
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3. What’s the Internet?
 The Internet is a global system of interconnected computer
networks that use the standard Internet protocol suite (often called
TCP/IP, although not all applications use TCP) to serve billions of
users worldwide. It is a network of networks that consists of
millions of private, public, academic, business, and government
networks, of local to global scope, that are linked by a broad array of
electronic, wireless and optical networking technologies. The
Internet carries an extensive range of information resources and
services, such as the inter-linked hypertext documents of the World
Wide Web (WWW) and the infrastructure to support email.
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4. History of the Internet
 In 1983, ARPA and the U.S. Department of Defense
Communications Agency was successfully developed
for heterogeneous networks, TCP / IP protocol, the
United States to the agreement of California at
Berkeley as part of BSD UNIX, which makes the
agreement has been popular in the community, thus
was born the real Internet.
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5. The technology about Internet------
Protocols
 The communications infrastructure of the Internet consists of its
hardware components and a system of software layers that control
various aspects of the architecture. While the hardware can often be
used to support other software systems, it is the design and the
rigorous standardization process of the software architecture that
characterizes the Internet and provides the foundation for its scalability
and success. The responsibility for the architectural design of the
Internet software systems has been delegated to the Internet
Engineering Task Force.
 The Internet standards describe a framework known as the Internet
protocol suite. This is a model architecture that divides methods into a
layered system of protocols
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6. The technology about Internet------
Protocols
 The most prominent component
of the Internet model is the
Internet Protocol (IP), which
provides addressing systems (IP
addresses) for computers on the
Internet. IP enables
internetworking and in essence
establishes the Internet itself. IP
Version 4 (IPv4) is the initial
version used on the first
generation of today's Internet and
is still in dominant use. It was
designed to address up to ~4.3
billion (109) Internet hosts
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7. The technology about Internet------Routing
 Internet Service Providers connect customers (thought of at the "bottom" of the
routing hierarchy) to customers of other ISPs. At the "top" of the routing hierarchy
are ten or so Tier 1 networks, large telecommunication companies which
exchange traffic directly "across" to all other Tier 1 networks via unpaid peering
agreements. Tier 2 networks buy Internet transit from other ISP to reach at least
some parties on the global Internet, though they may also engage in unpaid
peering (especially for local partners of a similar size). ISPs can use a single
"upstream" provider for connectivity, or use multihoming to provide protection
from problems with individual links. Internet exchange points create physical
connections between multiple ISPs, often hosted in buildings owned by
independent third parties.
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8. The importance of Internet
 Internet is now tied to more
than 160 countries and
regions, more than 40,000
sub-network, more than 500
million host computers
directly to customers over 40
million, becoming the world's
most extensive information
resources, public network
computers. Internet is
considered the prototype of
future global information
highway.
 2012 World Economic Forum Show the power
of the network
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9. Reference
 http://baike.baidu.com/view/11165.htm
 http://en.wikipedia.org/wiki/Internet
 http://zh.wikipedia.org/wiki/Internet
 http://baike.baidu.com/view/3487.htm
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10. THANKS