make a report on how the file is transmitted based on the layered structure of OSI Model. You should explain in your own words about how each step works and what happens in each layer

What need most led to the creation of the advanced research projects agency network? darpa wanted scientists to be able to collaborate and share research easily. darpa wanted american and russian politicians to be able to communicate. darpa wanted astronauts to be able to contact nasa and the white house. darpa wanted factory owners to be able to coordinate supply chains.