Transcript Chapter 1
Introduction and Overview Chapter 1 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 What Is TCP/IP? Official name: TCP/IP Internet Protocol Suite Transmission Control Protocol Standard transport level protocol Connection (stream of data) oriented Data travels in TCP segments Internet Protocol Connectionless (packet) oriented Puts TCP segments into IP datagrams Need for Multiple Protocols Protocols are standards Provide syntax and semantics for communication Protocols Computer communication Programming languages Computation Computation: not deal with CPU instruction set Communication: not deal with vendor’s hardware Hides low-level details of communication Programmers not know specific hardware Not change programs when hardware changes Applications work between arbitrary computers TCP/IP and OSI No official TCP/IP protocol architecture Has 5 relatively independent layers of communications tasks Standards have been developed for each layer IP used at internet layer TCP used at transport layer OSI model was developed to become the international standardized architecture Did not happen Key TCP/IP protocols were already mature OSI model is more complex 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) Read Chapter 1 What is internetworking? What are protocols? Why are they important? What is interoperability? What are the two broad types of protocol services? What services are provided in each type? What are the TCP/IP distinguishing features? History of the Internet Requests for Comments (RFCs) Future Growth TCP/IP and Internet continue to evolve Most significant is additional traffic Email to scientific files to WWW users All IPv4 IP addresses have been distributed as of 3 Feb 2011!! http://articles.cnn.com/2011-0203/tech/internet.addresses.gone_1_addressesinternet-numbers-new-pool?_s=PM:TECH Future Growth (contd) Growth of the connected Internet Networks Computers Users Managers 1980 101 102 102 100 1990 103 105 106 101 2000 105 107 108 102 2005 106 108 109 103 Miscellaneous Internet “Facts” ** Went over 1 billion in 2005 http://www.global-reach.biz/globstats/index.php3 <broken link> 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) Internet Traffic Report: http://www.internettrafficreport.com/main.htm Internet Health Report: http://www.internetpulse.net/