A presentation on the OSI model. Describes the need for a layered approach, and discusses the function of each of the layers.

1. OSI Reference Model Mukesh N. Tekwani Elphinstone College Mumbai

14. Layered Approach Peers

20. The Layers of the OSI Model Physical Data Link Network Transport Session Presentation Application

21. The Layers of the OSI Model Some Mnemonics A ll P eople S eem T o N eed D ata P rocessing P lease D o N ot T ell S ecret P asswords A nytime Physical Data Link Network Transport Session Presentation Application

23. Physical Layer

25. Data Link Layer

27. Network Layer

29. Transport Layer

31. Session Layer H5 syn syn syn From Presentation Layer To Transport Layer Session Layer From Transport Layer To Presentation Layer H5 syn syn syn Session Layer

35. Application Layer To Presentation Layer From Presentation Layer

36. Summary of Functions of Layers Physical Data Link Network Transport Session Presentation Application To allow access to network resources To establish, manage & terminate sessions To move packets from source to destination To transmit bits over a medium & provide electrical specs. To translate, encrypt and compress data To provide reliable end-to-end message delivery To organise bits into frames

38. Thank You