Network Models

OSI Model is stand for Open Systems Interconnection is an abstract description for layered communication and computer network protocol design. there are seven layer of OSI model.

• Layer 7 - Application - is for providing services to the user. 
• Layer 6 - Presentation - is for translation, compression and encryption.
• Layer 5 - Session - is responsible for dialog control and synchronization.
• Layer 4 - Transport - is responsible for the delivery of a message from one process to another.
• Layer 3 - Network - responsible for the delivery of individual packets from the source host to the destination host.
• Layer 2 - Data Link - is responsible for moving frames from one hop to the nest.
• Layer 1 - Physical - is to move data in the from of electromagnetic signals across a transmission medium. 

TCP/IP is stand for Transmission Control Protocol / Internet Protocol is the set of communications protocol used for the internet and other similar networks.

• Layer 4 - Application is represent data to the user and control dialogue 
• Layer 3 - Transport as the delivery service used by the application also handles all error detection and recovery. 
• Layer 2 - Internet is to organize or handle the movement of data on network.
• Layer 1 - Host to Network layer is known as network interface layer used to transfer the data over the network. 

extraganesh (2014). TCP/IP Network ppt. [online] Slideshare.net. Available at: https://www.slideshare.net/extraganesh/tcpip-network-ppt [Accessed 24 Apr. 2018].

Bandhe (2008). OSI Model. [online] Slideshare.net. Available at: https://www.slideshare.net/rahulbandhe/osi-model-presentation [Accessed 24 Apr. 2018].