Unlike the ISO/OSI reference model, TCP/IP architecture is only divided into 4 layers. The exchange of information between the layers is again exactly defined and again, each service uses the services of a lower level and provides its services to a higher layer.
The OSI Reference Model and TCP/IP architecture
The OSI Model was developed by the International Organization for Standardization in order to provide a standard for computer networking. In 1984 the organization accepted the model as an international standard documented in ISO 7498.