The difference between a calculator and a computer is that when a calculator performs computations it is slower but needs more human assistance - C.
While a computer on the other hand, computes tens of thousands of computations without any human input, all done automatically.
Answer: Bottom up approach
Explanation:
We should start from the bottom i.e.starting from the physical layer by inspecting the lan, switches, router and also as we move up the level we also need to check the software application and the various routing protocols at each successive levels.
Hence, we use bottom up approach.
I believe the answer is E. Railroad, hope this helps!
