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TCP/IP Suite (part 2) This lesson briefly reviews the OSI Model which has the following layers: - Physical - Datalink - Network - Transport - Session - Presentation - Application The lesson goes on to discuss how the seven layers of the OSI model relate to the TCP/IP suite. One of the protocols in this suite is Address Resolution Protocol (ARP), which allows computers on a network to determine other computers physical addresses, MAC addresses and correlate with their IP addresses and is located in the datalink layer of the OSI model. The lesson also covers IP which is connected to different routing protocols which route data and packets in the Network layer. Remember the OSI Model is used to help gain and understanding