Answer: Becoming a doctor or a surgeon is an honorable goal, but it is a long and challenging process, beginning with pursuing a bachelor's degree. The path to being a doctor typically takes a minimum of 12 years AFTER high school, specialties with extensive training periods can take five or more additional years.
Cyber-physical systems are helping firefighters detect and deter fires, improving agricultural practices and enabling scientists to mitigate underwater oil spills. Advances in cyber-physical systems will enable capability, adaptability, scalability, resiliency, safety, security and usability that will far exceed the simple embedded systems of today.
The lower layers are closest to the computer hardware; the higher levels are closer to human users; and each layer makes possible things that happen at the higher layers: 1  Physical: The basic hardware of the network, including cables and connections, and how devices are hooked up into a certain network topology (ring, bus, or whatever).