OSI Model Layer 3 Network This lessons covers layer 3, the Network Layer of the OSI model. It is commonly referred to as the IP layer. This is where logical addresses are translates into physical and network routing, re-assembly and fragmentation are performed.
Open Systems Interconnection model (OSI model)
The OSI Model is a conceptual model that characterizes and standardizes the communication functions of a telecommunication or computing system without regard to their underlying internal structure and technology