Give a Rationale for a layered approach to a network architecture.? How does TCP/IP differ from ISO/OSI?

Answer: Layered network architecture enables us a clear loosely coupled system with a definite distinction between the various layers visible.

Explanation:

Layered architecture enable independent deployment of each of the different layer, so that emphasis can be laid to the layers in respect of their protocol deployment.

TCP/IP is a standard model which is being followed everywhere, however the OSI is a conceptual model. The TCP/IP is actually derived from the OSI model.

Both the models differ in the number of layers present in them.

TCP/IP has 4 layers whereas OSI has 7 layers.