Chapter 2 The OSI Model  and TCP/IP  Protocol Suite
CONTENTS <ul><li>THE OSI MODEL </li></ul><ul><li>LAYERS IN THE OSI MODEL </li></ul><ul><li>TCP/IP PROTOCOL SUITE </li></ul...
THE  OSI  MODEL 2.1
ISO is the organization.  OSI is the model.
Figure  2-1 OSI  Model
Figure  2-2 OSI layers
Headers are added  to the data at layers  6, 5, 4, 3, and 2.  Trailers are usually  added only at layer 2.
Figure  2-3 An exchange using the OSI model
LAYERS  IN  THE  OSI  MODEL 2.2
Figure  2-4 Physical Layer
Figure  2-5 Data Link Layer
Figure  2-6 Node-to-node delivery
Figure  2-7 Network Layer
Figure  2-8 End-to-end delivery
Figure  2-9 Transport Layer
Figure  2-10 Reliable end-to-end delivery of a message
Figure  2-11 Session Layer
Figure  2-12 Presentation Layer
Figure  2-13 Application  Layer
Figure  2-14 Summary of layers
TCP/IP  PROTOCOL  SUITE 2.3
Figure  2-15 TCP/IP and OSI model
ADDRESSING 2.4
Figure  2-16 Addresses in TCP/IP
Figure  2-17 Relation- ship  of  layers  and  addresses  in TCP/IP
Example 1 Figure 2.18 shows an example of physical addresses.
Figure  2-18 Physical addresses
Example 2 Most local area networks use a 48-bit (6 bytes) physical address written as 12 hexadecimal digits, with every 2 ...
Example 3 Figure 2.19 shows an example of Internet addresses.
Figure  2-19 IP addresses
Example 4 As we will see in Chapter 4, an Internet address (in IPv4) is 32 bits in length, normally written as four decima...
Example 5 Figure 2.20 shows an example of transport layer communication.
Figure  2-20 Port addresses
Example 6 As we will see in Chapters 11 and 12, a port address is a 16-bit address represented by one decimal number as sh...
TCP/IP  VERSIONS 2.5
<ul><li>Versions: </li></ul><ul><li>Version 4 (current) </li></ul><ul><li>Version 5   </li></ul><ul><li>Version 6 (future)...
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Ch02

  1. 1. Chapter 2 The OSI Model and TCP/IP Protocol Suite
  2. 2. CONTENTS <ul><li>THE OSI MODEL </li></ul><ul><li>LAYERS IN THE OSI MODEL </li></ul><ul><li>TCP/IP PROTOCOL SUITE </li></ul><ul><li>ADDRESSING </li></ul><ul><li>TCP/IP VERSIONS </li></ul>
  3. 3. THE OSI MODEL 2.1
  4. 4. ISO is the organization. OSI is the model.
  5. 5. Figure 2-1 OSI Model
  6. 6. Figure 2-2 OSI layers
  7. 7. Headers are added to the data at layers 6, 5, 4, 3, and 2. Trailers are usually added only at layer 2.
  8. 8. Figure 2-3 An exchange using the OSI model
  9. 9. LAYERS IN THE OSI MODEL 2.2
  10. 10. Figure 2-4 Physical Layer
  11. 11. Figure 2-5 Data Link Layer
  12. 12. Figure 2-6 Node-to-node delivery
  13. 13. Figure 2-7 Network Layer
  14. 14. Figure 2-8 End-to-end delivery
  15. 15. Figure 2-9 Transport Layer
  16. 16. Figure 2-10 Reliable end-to-end delivery of a message
  17. 17. Figure 2-11 Session Layer
  18. 18. Figure 2-12 Presentation Layer
  19. 19. Figure 2-13 Application Layer
  20. 20. Figure 2-14 Summary of layers
  21. 21. TCP/IP PROTOCOL SUITE 2.3
  22. 22. Figure 2-15 TCP/IP and OSI model
  23. 23. ADDRESSING 2.4
  24. 24. Figure 2-16 Addresses in TCP/IP
  25. 25. Figure 2-17 Relation- ship of layers and addresses in TCP/IP
  26. 26. Example 1 Figure 2.18 shows an example of physical addresses.
  27. 27. Figure 2-18 Physical addresses
  28. 28. Example 2 Most local area networks use a 48-bit (6 bytes) physical address written as 12 hexadecimal digits, with every 2 bytes separated by a hyphen as shown below: 07-01-02-01-2C-4B A 6-byte (12 hexadecimal digits) physical address
  29. 29. Example 3 Figure 2.19 shows an example of Internet addresses.
  30. 30. Figure 2-19 IP addresses
  31. 31. Example 4 As we will see in Chapter 4, an Internet address (in IPv4) is 32 bits in length, normally written as four decimal numbers, with each number representing 1 byte. The numbers are separated by a dot. Below is an example of such an address. 132.24.75.9
  32. 32. Example 5 Figure 2.20 shows an example of transport layer communication.
  33. 33. Figure 2-20 Port addresses
  34. 34. Example 6 As we will see in Chapters 11 and 12, a port address is a 16-bit address represented by one decimal number as shown below. 753 A 16-bit port address
  35. 35. TCP/IP VERSIONS 2.5
  36. 36. <ul><li>Versions: </li></ul><ul><li>Version 4 (current) </li></ul><ul><li>Version 5 </li></ul><ul><li>Version 6 (future) </li></ul>

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