Transcript Lecture 29 - Electrical and Computer Engineering

Telecommunications Networking
II
Lecture 29
Introduction to the Internet
Ref: “Computer Networks”
(Andrew Tanenbaum)
pp47-54, 70-72
Copyright 1999, S.D. Personick. All Rights Reserved.
Internet Time Line
• 1962 Paul Baron proposes the concept of
utilizing packets to transport information
between computers
• 1969 ARPAnet placed in service (4 nodes)
• 1974 Cerf and Kahn invent TCP/IP
• circa 1988 NSFnet
• 1990 ANS takes over operation of NSFnet
Copyright 1999, S.D. Personick. All Rights Reserved.
Internet Time Line
• 1990 1 millionth host attached to “the
Internet”
• 1995 NSFnet is decommissioned, and
replaced by the “Network Access Point”
(NAP) architecture
• 1995+ Rapid growth of Internet usage by
businesses, organizations, government and
individuals (E-mail, WWW, E-commerce)
Copyright 1999, S.D. Personick. All Rights Reserved.
Internet Time Line
• ~2000 Aggregate Internet backbone traffic
exceeds traditional telephone network
traffic in the U.S. (~ 2 Tbps)
• ~2000 Traditional telephone network
applications begin to rapidly migrate to IPversions (e.g., telephony)
• ~2005 Large numbers of residential
customers have broadband access to the
Internet (cable modems and XDSL)
Copyright 1999, S.D. Personick. All Rights Reserved.
Internet Time Line
• ~ 2005 Traditional telephone network usage
and revenues are in rapid decline*
*Some would argue that this is too
pessimistic; particularly with the popularity
of cellular/PCS
Copyright 1999, S.D. Personick. All Rights Reserved.
Internet Applications (today)
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E-mail
WWW + E-Commerce
News groups/Chat rooms
Bulk file transfers (including music)
Downloading application software
Remote login and remote control
DNS
Broadcasting (audio and video)
Telephony (emerging)
Copyright 1999, S.D. Personick. All Rights Reserved.
Internet Trends
• Multimedia versions of earlier applications
(e.g., attachments to plain text E-mail)
• Broadband access by end users
• “Internet dial tone”
• Improved security and reliability
• Quality of Service (QOS) capabilities
• New Applications (e.g., Internet telephony)
• Next Generation Internet (e.g., “active
nets”, new network architectures)
Copyright 1999, S.D. Personick. All Rights Reserved.
Who’s in Charge (nobody)
• Internet services are not regulated by the
FCC (at least not directly) in the U.S.
• The Internet is a global enterprise
(transcends national boundaries)
• Technical standards are adopted by the
Internet Engineering Task Force (so far)
• The Internet Society (IAB, IETF)
• IANNA..., service providers, equipment
suppliers, ...
Copyright 1999, S.D. Personick. All Rights Reserved.
Summary
• The Internet is an organically evolving
collection of networks, protocols,
technologies, and applications
• The Internet is embodied in a philosophy of
rapidly responding to customer-driven
needs
• The Internet is still in its adolescence
(money brings out the worst in people)
Copyright 1999, S.D. Personick. All Rights Reserved.