1. Copyright 2002, S.D. Personick. All Rights Reserved.1 Telecommunications Networking II Topic 17 Introduction to the Internet Ref: “Computer Networks” by Andrew Tanenbaum pp47-54, 70-72 Dr. Stewart D. Personick Drexel University

2. Copyright 2002, S.D. Personick. All Rights Reserved.2 Internet Time Line 1962 Paul Baran 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

3. Copyright 2002, S.D. Personick. All Rights Reserved.3 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)

4. Copyright 2002, S.D. Personick. All Rights Reserved.4 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 IP- versions (e.g., telephony) ~2005 Large numbers of residential customers have broadband access to the Internet (cable modems and XDSL)

5. Copyright 2002, S.D. Personick. All Rights Reserved.5 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

6. Copyright 2002, S.D. Personick. All Rights Reserved.6 Internet Applications (today) 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)

7. Copyright 2002, S.D. Personick. All Rights Reserved.7 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)

8. Copyright 2002, S.D. Personick. All Rights Reserved.8 Who’s in Charge (nobody) Internet services are not regulated by the FCC (at least not directly and not yet) 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,...

9. Copyright 2002, S.D. Personick. All Rights Reserved.9 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)