Protocol Layers:
The original TCP/IP model was defined as four software layers build upon the hardware.
However, today, TCP/IP is thought of as a five-layer model with the layers named similarly to the ones in the OSI model.
- Physical Layer
- Data Link Layer
- Network Layer
- Transport Layer
- Application Layer
Supports all of the standard and proprietary protocols.
At this level, the communication is between two hops or nodes, either a computer or router.
The unit of communication is a single bit.
Treat each bit individually.