TCP/IP Model Layers

Deals with network applications. Maps to the OSI layers 7 - Application, 6 - Presentation, and 5 - Session

Deals with host to host communication. Maps to the OSI layer 4 - Transport

Deals with the routing or path of the communication. Maps to the OSI layer 3 -Network

Deals with two functions: the framing of the data and signaling over the physical media. Maps to the OSI layers 2 - Data Link, & 1 - Physical