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Introduction Chapter 1 Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
Uses of Computer Networks • Business Applications • Home Applications • Mobile Users • Social Issues Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
Business Applications (1) A network with two clients and one server Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
Business Applications (2) The client-server model involves requests and replies Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
Home Applications (1) In a peer-to-peer system there are no fixed clients and servers. Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
Home Applications (2) Some forms of e-commerce Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
Mobile Users Combinations of wireless networks and mobile computing Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
Social Issues • Network neutrality • Digital Millennium Copyright Act • Profiling users • Phishing Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
Network Hardware (1) • Personal area networks • Local area networks • Metropolitan area networks • Wide are networks • The internet Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
Network Hardware (2) Classification of interconnected processors by scale. Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
Personal Area Network Bluetooth PAN configuration Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
Local Area Networks Wireless and wired LANs. (a) 802.11. (b) Switched Ethernet. Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
Metropolitan Area Networks A metropolitan area network based on cable TV. Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
Wide Area Networks (1) WAN that connects three branch offices in Australia Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
Wide Area Networks (2) WAN using a virtual private network. Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
Wide Area Networks (3) WAN using an ISP network. Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
Network Software • Protocol hierarchies • Design issues for the layers • Connection-oriented versus connectionless service • Service primitives • Relationship of services to protocols Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
Protocol Hierarchies (1) Layers, protocols, and interfaces. Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
Protocol Hierarchies (2) The philosopher-translator-secretary architecture Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
Protocol Hierarchies (3) Example information flow supporting virtual communication in layer 5. Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
Connection-Oriented Versus Connectionless Service Six different types of service. Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
Service Primitives (1) Six service primitives that provide a simple connection-oriented service Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
Service Primitives (2) A simple client-server interaction using acknowledged datagrams. Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
The Relationship of Services to Protocols The relationship between a service and a protocol. Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
Reference Models • OSI reference model • TCP/IP reference model • Model used for this text • Comparison of OSI and TCP/IP • Critique of OSI model and protocols • Critique of TCP/IP model Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
The OSI Reference Model Principles for the seven layers • Layers created for different abstractions • Each layer performs well-defined function • Function of layer chosen with definition of international standard protocols in mind • Minimize information flow across interfaces between boundaries • Number of layers optimum Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
The OSI Reference Model The OSI reference model Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
OSI Reference Model Layers • Physical layer • Data link layer • Network layer • Transport layer • Session layer • Presentation layer • Application layer Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
The TCP/IP Reference Model Layers • Link layer • Internet layer • Transport layer • Application layer Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
The TCP/IP Reference Model (1) The TCP/IP reference model Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
The TCP/IP Reference Model (2) The TCP/IP reference model with some protocols we will study Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
The Model Used in this Book The reference model used in this book. Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
Comparison of the OSI and TCP/IP Reference Models Concepts central to OSI model • Services • Interfaces • Protocols Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
Critique of the OSI Model and Protocols • Bad timing. • Bad technology. • Bad implementations. • Bad politics. Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
OSI Model Bad Timing The apocalypse of the two elephants. Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
Example Networks • Internet • ARPANET • NSFNET • Third-generation mobile phone networks • Wireless LANs: 802.11 • RFID and sensor networks Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
The ARPANET (1) a) Structure of the telephone system. b) Baran’s proposed distributed switching system. Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
The ARPANET (2) The original ARPANET design Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
The ARPANET (3) Growth of the ARPANET. a) December 1969. b) July 1970. c) March 1971. Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
The ARPANET (4) Growth of the ARPANET. d) April 1972. e) September 1972. Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
NSFNET The NSFNET backbone in 1988. Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
Architecture of the Internet Overview of the Internet architecture Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
Third-Generation Mobile Phone Networks (1) Cellular design of mobile phone networks Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
Third-Generation Mobile Phone Networks (2) Architecture of the UMTS 3G mobile phone network. Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
Third-Generation Mobile Phone Networks (3) Mobile phone handover (a) before, (b) after. Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
Wireless LANs: 802.11 (1) (a) Wireless network with an access point. (b) Ad hoc network. Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
Wireless LANs: 802.11 (2) Multipath fading Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
Wireless LANs: 802.11 (3) The range of a single radio may not cover the entire system. Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
RFID and Sensor Networks (1) RFID used to network everyday objects. Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
RFID and Sensor Networks (2) Multihop topology of a sensor network Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
Network Standardization • Who’s Who in telecommunications • Who’s Who in international standards • Who’s Who in internet standards Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
Who’s Who in International Standards (1) The 802 working groups. The important ones are marked with *. The ones marked with ↓ are hibernating. The one marked with † gave up and disbanded itself. Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
Who’s Who in International Standards (2) The 802 working groups. The important ones are marked with *. The ones marked with ↓ are hibernating. The one marked with † gave up and disbanded itself. Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
Metric Units (1) The principal metric prefixes Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
Metric Units (2) The principal metric prefixes Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
End Chapter 1 Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011

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Chapter1 computer introduction note

  • 1. Introduction Chapter 1 Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
  • 2. Uses of Computer Networks • Business Applications • Home Applications • Mobile Users • Social Issues Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
  • 3. Business Applications (1) A network with two clients and one server Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
  • 4. Business Applications (2) The client-server model involves requests and replies Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
  • 5. Home Applications (1) In a peer-to-peer system there are no fixed clients and servers. Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
  • 6. Home Applications (2) Some forms of e-commerce Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
  • 7. Mobile Users Combinations of wireless networks and mobile computing Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
  • 8. Social Issues • Network neutrality • Digital Millennium Copyright Act • Profiling users • Phishing Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
  • 9. Network Hardware (1) • Personal area networks • Local area networks • Metropolitan area networks • Wide are networks • The internet Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
  • 10. Network Hardware (2) Classification of interconnected processors by scale. Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
  • 11. Personal Area Network Bluetooth PAN configuration Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
  • 12. Local Area Networks Wireless and wired LANs. (a) 802.11. (b) Switched Ethernet. Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
  • 13. Metropolitan Area Networks A metropolitan area network based on cable TV. Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
  • 14. Wide Area Networks (1) WAN that connects three branch offices in Australia Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
  • 15. Wide Area Networks (2) WAN using a virtual private network. Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
  • 16. Wide Area Networks (3) WAN using an ISP network. Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
  • 17. Network Software • Protocol hierarchies • Design issues for the layers • Connection-oriented versus connectionless service • Service primitives • Relationship of services to protocols Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
  • 18. Protocol Hierarchies (1) Layers, protocols, and interfaces. Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
  • 19. Protocol Hierarchies (2) The philosopher-translator-secretary architecture Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
  • 20. Protocol Hierarchies (3) Example information flow supporting virtual communication in layer 5. Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
  • 21. Connection-Oriented Versus Connectionless Service Six different types of service. Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
  • 22. Service Primitives (1) Six service primitives that provide a simple connection-oriented service Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
  • 23. Service Primitives (2) A simple client-server interaction using acknowledged datagrams. Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
  • 24. The Relationship of Services to Protocols The relationship between a service and a protocol. Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
  • 25. Reference Models • OSI reference model • TCP/IP reference model • Model used for this text • Comparison of OSI and TCP/IP • Critique of OSI model and protocols • Critique of TCP/IP model Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
  • 26. The OSI Reference Model Principles for the seven layers • Layers created for different abstractions • Each layer performs well-defined function • Function of layer chosen with definition of international standard protocols in mind • Minimize information flow across interfaces between boundaries • Number of layers optimum Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
  • 27. The OSI Reference Model The OSI reference model Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
  • 28. OSI Reference Model Layers • Physical layer • Data link layer • Network layer • Transport layer • Session layer • Presentation layer • Application layer Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
  • 29. The TCP/IP Reference Model Layers • Link layer • Internet layer • Transport layer • Application layer Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
  • 30. The TCP/IP Reference Model (1) The TCP/IP reference model Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
  • 31. The TCP/IP Reference Model (2) The TCP/IP reference model with some protocols we will study Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
  • 32. The Model Used in this Book The reference model used in this book. Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
  • 33. Comparison of the OSI and TCP/IP Reference Models Concepts central to OSI model • Services • Interfaces • Protocols Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
  • 34. Critique of the OSI Model and Protocols • Bad timing. • Bad technology. • Bad implementations. • Bad politics. Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
  • 35. OSI Model Bad Timing The apocalypse of the two elephants. Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
  • 36. Example Networks • Internet • ARPANET • NSFNET • Third-generation mobile phone networks • Wireless LANs: 802.11 • RFID and sensor networks Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
  • 37. The ARPANET (1) a) Structure of the telephone system. b) Baran’s proposed distributed switching system. Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
  • 38. The ARPANET (2) The original ARPANET design Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
  • 39. The ARPANET (3) Growth of the ARPANET. a) December 1969. b) July 1970. c) March 1971. Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
  • 40. The ARPANET (4) Growth of the ARPANET. d) April 1972. e) September 1972. Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
  • 41. NSFNET The NSFNET backbone in 1988. Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
  • 42. Architecture of the Internet Overview of the Internet architecture Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
  • 43. Third-Generation Mobile Phone Networks (1) Cellular design of mobile phone networks Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
  • 44. Third-Generation Mobile Phone Networks (2) Architecture of the UMTS 3G mobile phone network. Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
  • 45. Third-Generation Mobile Phone Networks (3) Mobile phone handover (a) before, (b) after. Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
  • 46. Wireless LANs: 802.11 (1) (a) Wireless network with an access point. (b) Ad hoc network. Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
  • 47. Wireless LANs: 802.11 (2) Multipath fading Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
  • 48. Wireless LANs: 802.11 (3) The range of a single radio may not cover the entire system. Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
  • 49. RFID and Sensor Networks (1) RFID used to network everyday objects. Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
  • 50. RFID and Sensor Networks (2) Multihop topology of a sensor network Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
  • 51. Network Standardization • Who’s Who in telecommunications • Who’s Who in international standards • Who’s Who in internet standards Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
  • 52. Who’s Who in International Standards (1) The 802 working groups. The important ones are marked with *. The ones marked with ↓ are hibernating. The one marked with † gave up and disbanded itself. Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
  • 53. Who’s Who in International Standards (2) The 802 working groups. The important ones are marked with *. The ones marked with ↓ are hibernating. The one marked with † gave up and disbanded itself. Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
  • 54. Metric Units (1) The principal metric prefixes Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
  • 55. Metric Units (2) The principal metric prefixes Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011
  • 56. End Chapter 1 Computer Networks, Fifth Edition by Andrew Tanenbaum and David Wetherall, © Pearson Education-Prentice Hall, 2011