Lecture 1 Introduction

Instructor  Name: Seokwoo Song  Office: COBA 524  Phone:  Office Hours: M W 4:30 – 5:30 PM or by appointment M W 4:30 – 5:30 PM or by appointment   Website:

 Required Textbook Michael Palmer, Hands-On Networking Fundamentals, Thomson Course Technology, 2006.

Evaluation  Exam 1 70  Exam 2 70  Exam 3 70  Hands-on Project 60  Assignments 30  Total300 pts

A Brief History of Communications in the U.S.  Alexander Graham Bell, invented the first telephone capable of practical use.  AT&T was officially registered  permitted MCI to provide limited long distance service in competition to AT&T.  divestiture of AT&T AT&T ( IXC = Interexchange Carrier) AT&T ( IXC = Interexchange Carrier) RBOCs = Regional Bell Operating Companies RBOCs = Regional Bell Operating Companies

A Brief History of Communications in the U.S.  Deregulation Act: U.S. Congress enacted the Telecommunications Act. U.S. Congress enacted the Telecommunications Act. Replaced all the current laws and FCC regulations Replaced all the current laws and FCC regulations Telecommunications Act of 1996 Local telephone industry in the U.S. went from a highly regulated and legally restricted monopoly to open competition. Local telephone industry in the U.S. went from a highly regulated and legally restricted monopoly to open competition. Local service in the U.S. is now open for competition. Local service in the U.S. is now open for competition. RBOCs are now permitted to provide long distance services. RBOCs are now permitted to provide long distance services.

Communications in the U.S.  RBOC = Regional Bell Operating Companies Pac-Bell, Bell South, Bell Atlantic, NYNEX Pac-Bell, Bell South, Bell Atlantic, NYNEX US-West, Ameritech, Southwestern Bell US-West, Ameritech, Southwestern Bell  LEC = Local Exchange Carriers  IXC = Inter-exchange carriers AT&T, MCI-WorldCom, Sprint AT&T, MCI-WorldCom, Sprint GTE - currently known as Verizon GTE - currently known as Verizon

A Brief History of Internet  Internet started by the US-DoD and was known as ARPANET  Internet split into 2-parts: Milnet - devoted to military network Milnet - devoted to military network Internet - devoted to the university research Internet - devoted to the university research  BITNET Completed by the Canadian government Completed by the Canadian government Links the Canadian universities coast to coast Links the Canadian universities coast to coast

A Brief History of Internet  All networks around the world joined together and formed---the Internet.  Status of the Internet: Almost 4-million servers on the Internet Almost 4-million servers on the Internet  million servers 40 million servers 400 million people 400 million people Most Internet-users are young Most Internet-users are young Most of these users are male/under 35 Most of these users are male/under 35

What is the Internet?  A “network of networks”  A set of connected devices that communicate using a given protocol suite called TCP/IP  No central control although there is central discussion.  Every computer has a unique address IPv4 IP address: 32 bit number presented in four octets called a dotted quad. Ex: IPv4 IP address: 32 bit number presented in four octets called a dotted quad. Ex: IPv6 or IPng (IP next generation) IP address: 128 bit number, downward/upward compatible with IPv4 IPv6 or IPng (IP next generation) IP address: 128 bit number, downward/upward compatible with IPv4

The Old NSF Backbone

A Modern ISP: UUNet

Internet Governance  There is no central control but: Domain name registration (.com,.net, or.org) is handled by a partnership of the government and several private firms, ex. Network Solutions. Domain name registration (.com,.net, or.org) is handled by a partnership of the government and several private firms, ex. Network Solutions. Network Solutions Network Solutions Standards and protocols are hashed out Standards and protocols are hashed out Internet SocietyInternet Society Internet Architecture BoardInternet Architecture Board Internet Engineering Task Force (IETF)Internet Engineering Task Force (IETF)