It is responsible for mapping hardware addresses to network traffic. The MAC sub layer is concerned with media access issues, such as whether token passing or contention will be used.
Machine languages are the only languages understood by computers.
While easily understood by computers, machine languages are almost impossible for humans to use because they consist entirely of numbers. Programmers, therefore, use either a high-level programming language or an assembly language. An assembly language contains the same instructions as a machine language, but the instructions and variables have names instead of being just numbers. Similar to a LAN but typically deployed over a larger area like a city. A manual power down mode is when the device puts itself in a power down mode to consume lesser power.