Introduction and Overview

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
• Connection (stream of data) oriented
• Data travels in TCP segments
• Internet Protocol
• Connectionless (packet) oriented
• Puts TCP segments into IP datagrams

4
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 vendors hardware
• Hides low-level details of communication
• Programmers not know specific hardware
• Not change programs when hardware changes
• 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
• 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

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 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)

9
Future Growth

• TCP/IP and Internet continue to evolve
• Most significant is additional traffic
• Email to scientific files to WWW users
• Growth of the connected Internet

10
Miscellaneous Internet Facts
Went over 1 billion in 2005
http//www.global-reach.biz/globstats/index.php3
11
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.internettrafficrepo
rt.com/main.htm)
12
(No Transcript)
13
(No Transcript)
14

• Internet Health Report
• http//www.internetpulse.net/