Your question is OSI Model and TCP/IP. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
What is the OSI model, and how does it relate to TCP/IP? Walk through the layers, explain the purpose of each, and describe how the two models map to each other in real networking.