1. TCP/IP Concepts Jacob Jespersen 2140791

2. OSI Reference Model 3. The Network Interface Layer This layer is also known as the physical layer, it is defined by what type of physical network your computer is connected to. TCP/IP is a set of protocols that deals with layers 3 to 7 of the OSI reference model, while Ethernet is a set of protocols that deals with layers 1 and 2 from the OSI reference model. 4. Internet Layer On TCP/IP networks each computer is identified with a unique virtual address, called IP address. The internet layer is in charge of adding a header to the data packet received from the transport layer where, among other control data, it will add the source IP address and the target IP address 5. Transport Layer When transmitting data, the transport layer gets data from the application layer and divides them into several data packets. TCP is the most used protocol on the transport layer. TCP protocol also determines if received packets arrive intact and in order and will send an acknowledge signal to the transmitter if all is well. 6. Application Layer This layer makes the communication between programs and the transport protocols. There are several different protocols that work on the application layer. 7. Data Encapsulation Alternatively Data decapsulation reverses this process, taking the information up the osi reference model removing the headers that were added on in the encapsulation process. 8. Conclusions and Biblography http://www.hardwaresecrets.com/printpage/The-OSI-Reference- Model-for-Network-Protocols/431 http://www.youtube.com/watch?v=m07L9y3pSB4