OSI Layer

      Well on this time we are going to discuss one of the important concept in networking that is called OSI layer.
      OSI stands for open system interconnect,here we are going to discuss the internal detail of the OSI layer.It contain the seven layer and each layer perform the several action in the network.They are

•  Application Layer                 
•  Presentation Layer 
•  Session Layer  
•  Transport Layer            
•   Network Layer  
•   Data Link Layer           
•   Physical Layer        

      These are the various OSI layers and each layer perform sever opeartion.It contain the three hardware layers and three software layers.The Hardware layers are Application,Presentation,Session.The Software layers are the Network,Data Link and Physical layer.
       In these the first layer is the physical layer it contain the physical devices like the cables and wires.It contain the binary code which means it convert the signals into binary.
      The second layer is the data link layer and it contain the layer two device called switch.It contain the MAC address and LLC in the networks.It is used to fragment the packets called data-gram.
      The third layer is the network layer and it contain the core devices like the Router.It is used to connect the different devices in the network.It is used to find the shortest path in the network.
      The Fourth layer is the heart of the OSI layer called the transport layer and it is used for the mode of communication.It contain the two major protocol they are the TCP/IP and the UDP.
      The Fifth layer is the session layer and it is used to establish the session in the network.The sixth layer is the presentation layer and it contain the encryption and decryption process of the packet.
      The final layer is the application layer and it is used for the communication of the two networks.This are the various layer of OSI.