OSI REFERENCE MODEL

How Many Layers are in OSI (open system interconnection Model) &

data encapsulation in each layer?

Seven Layers:

         

          Application - Process to application   - Data

          Presentation - Presentation of data and encryption - Data

          Session- session between hosts - Data

          Transport - End to End connection and reliability -Segment

         

          Network - Best path determination with the help of logical addressing - Packets

          Data link - Physical address MAC Addressing - Frame
          
          Physical - Media, Signal and binary transmission -Bit.

How Many Layers are in DOD (TCP/IP reference) Model?

Four Layers:

         

          Application

          Transport

         

          Internet

          Network Access