1. Introduction and Overview Chapter 1

2. Why Study TCP/IP? Forms global Internet base technology Has accommodated explosive growth well Protocols work over high-speed networks Basic design has handled new applications Protocol suite has been adapted to new network technologies Principles of architecture, addressing, routing, etc. are similar in all protocol suites

3. What Is TCP/IP? Official name: TCP/IP Internet Protocol Suite Transmission Control Protocol Standard transport level protocol Standard transport level protocol Connection (stream of data) oriented Connection (stream of data) oriented Data travels in TCP segments Data travels in TCP segments Internet Protocol Connectionless (packet) oriented Connectionless (packet) oriented Puts TCP segments into IP datagrams Puts TCP segments into IP datagrams

4. Need for Multiple Protocols Protocols are standards Provide syntax and semantics for communication Provide syntax and semantics for communication Protocols  Computer communication Programming languages  Computation Computation: not deal with CPU instruction set Computation: not deal with CPU instruction set Communication: not deal with vendor’s hardware Communication: not deal with vendor’s hardware Hides low-level details of communication Programmers not know specific hardware Programmers not know specific hardware Not change programs when hardware changes Not change programs when hardware changes Applications work between arbitrary computers Applications work between arbitrary computers

5. TCP/IP and OSI

6. No official TCP/IP protocol architecture Has 5 relatively independent layers of communications tasks Has 5 relatively independent layers of communications tasks Standards have been developed for each layer Standards have been developed for each layer IP used at internet layer IP used at internet layer TCP used at transport layer TCP used at transport layer OSI model was developed to become the international standardized architecture Did not happen Did not happen Key TCP/IP protocols were already mature OSI model is more complex

7. Organization of the Text Intro and overview of underlying technologies (chap 1-2) TCP/IP from the viewpoint of a single host (chap 3-12) Internet architecture as viewed globally (chap 13-19, 31) Application level services (chap 20-30)

8. Read Chapter 1 What is internetworking? What is internetworking? What are protocols? Why are they important? What are protocols? Why are they important? What is interoperability? What is interoperability? What are the two broad types of protocol services? What are the two broad types of protocol services? What services are provided in each type? What are the TCP/IP distinguishing features? What are the TCP/IP distinguishing features? History of the Internet History of the Internet Requests for Comments (RFCs) Requests for Comments (RFCs)

9. Future Growth TCP/IP and Internet continue to evolve Most significant is additional traffic Email to scientific files to WWW users Email to scientific files to WWW users All IPv4 IP addresses have been distributed as of 3 Feb 2011!! http://articles.cnn.com/2011-02- 03/tech/internet.addresses.gone_1_addresses- internet-numbers-new-pool?_s=PM:TECH http://articles.cnn.com/2011-02- 03/tech/internet.addresses.gone_1_addresses- internet-numbers-new-pool?_s=PM:TECH http://articles.cnn.com/2011-02- 03/tech/internet.addresses.gone_1_addresses- internet-numbers-new-pool?_s=PM:TECH http://articles.cnn.com/2011-02- 03/tech/internet.addresses.gone_1_addresses- internet-numbers-new-pool?_s=PM:TECH

10. Future Growth (contd) Growth of the connected Internet NetworksComputersUsersManagers 1980 10 1 10 2 10 0 1990 10 3 10 5 10 6 10 1 2000 10 5 10 7 10 8 10 2 2005 10 6 10 8 10 9 10 3

11. Miscellaneous Internet “Facts” http://www.global-reach.biz/globstats/index.php3 ** Went over 1 billion in 2005

14. The Global Index is the overall average of the response rating from all servers queried in the Internet Traffic report. Higher Index means faster Internet. ( http://www.internettrafficreport.com/main.htm) http://www.internettrafficreport.com/main.htm

17. Internet Traffic Report: http://www.internettrafficreport.com/main.htm http://www.internettrafficreport.com/main.htm http://www.internettrafficreport.com/main.htm Internet Health Report: http://www.internetpulse.net/ http://www.internetpulse.net/ http://www.internetpulse.net/