IPV4 IP Addressing and Subnetting

TCP/IP = means (Transmission Control Protocol/Internet Protocol) - was created by Department of Defense (DoD).

OSI Layer = OSI means Open Systems Interconnection.

The Seven OSI Layers are the following:

1. Application
2. Presentation
3. Session
4. Transport
5. Network
6. Data Link
7. Physical

Below are the comparison of DoD and OSI Models :