1 / 52

OSI Model

OSI Model. Cisco Academy Semester 1, Chapter 2. The Seven Layers of the OSI Model. International Organization of Standardization ISO. Layer7.

Download Presentation

OSI Model

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. OSI Model Cisco Academy Semester 1, Chapter 2

  2. The Seven Layers of the OSI Model International Organization of Standardization ISO

  3. Layer7 • The application layer is the OSI layer that is closest to the user; it provides network services to the user’s applications. It differs from the other layers in that it does not provide services to any other OSI layer, but rather, only to applications outside the OSI model. Examples of such applications are spreadsheet programs, word processing programs, and bank terminal programs. If you want to remember Layer 7 in as few words as possible, think of browsers.

  4. Layer 6 • The presentation layer ensures that the information that the application layer of one system sends out is readable by the application layer of another system. If necessary, the presentation layer translates between multiple data formats by using a common format. If you want to think of Layer 6 in as few words as possible, think of a common data format

  5. Layer 5 • As its name implies, the session layer establishes, manages, and terminates sessions between two communicating hosts. The session layer provides its services to the presentation layer. It also synchronizes dialogue between the two hosts' presentation layers and manages their data exchange. If you want to remember Layer 5 in as few words as possible, think of dialogues and conversations.

  6. Layer 4 • The transport layer segments data from the sending host's system and reassembles the data into a data stream on the receiving host's system. Layer 4 is the boundary between media-layer protocols and host-layerprotocols. Layer 4 also deals with Flow Control (Windowing), and Reliability of Communication (Acknowledgement).

  7. Layer 3 • The network layer is a complex layer that provides connectivity and path selection between two host systems that may be located on geographically separated networks. If you want to remember Layer 3 in as few words as possible, think of path selection, routing, and addressing.

  8. Layer 2 • The data link layer provides reliable transit of data across a physical link. In so doing, the data link layer is concerned with physical (as opposed to logical) addressing, network topology, network access, error notification, ordered delivery of frames. If you want to remember Layer 2 in as few words as possible, think of frames and media access control.

  9. Layer 1 • The physical layer defines the electrical, mechanical, procedural, and functional specifications for activating, maintaining, and deactivating the physical link between end systems. Such characteristics as voltage levels, timing of voltage changes, physical data rates, maximum transmission distances, physical connectors, and other, similar, attributes are defined by physical layer specifications. If you want to remember Layer 1 in as few words as possible, think of signals and media.

  10. Encapsulation

  11. Summary of the OSI Model Layer Description

  12. 5 Conversion Steps to Encapsulate Data

  13. TCP/IP Model The OSI Model

  14. TCP/IP Protocols

  15. OSI Comparison With TCP/IP Protocol Stack

  16. Focus of the CCNA Curriculum

  17. OSI Model CCNA Exam Questions

  18. Question 1

  19. Question 2

  20. Question 3

  21. Question 4

  22. Question 5

  23. Question 6

  24. Question 7

  25. Question 8

  26. Question 9

  27. Question 10

  28. Question 12

  29. Question 13

  30. Question 14

  31. Question 15

  32. Question 16

  33. Question 17

  34. Question 18

  35. Question 19

  36. Question 20

  37. Question 21

  38. Question 22

  39. Question 23

  40. Question 24

  41. Question 25

  42. Question 26

  43. Question 27

  44. Question 28

  45. Question 29

  46. Question 30

  47. Question 31

  48. Question 32

  49. Question 33

  50. Question 34

More Related