Simple Explanation About OSI(Open System Inter Connection) Layer

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OSI has 7 different layer.For top tree layer is used to define how the applications within the end stations will communicate with each others. Bottom four layers define how to transmitted data end to end.
7 OSI layer

  1. Application=Provides a user interface
  2. Presentation=Present data and Handles processing such as encryption
  3. Session=Keep different applications data separate
  4. Transport=Provides reliable or unreliable delivery
  5. Network=Provides logical addressing and which router use for path determination
  6. Data Link=Combine packets into bytes and bytes into frame,provides access to media using MAC address,performs error detection not connection.
  7. Physical=Moves bits between devices,specifies voltage and wire speed and pin out of cable 

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