Depends on how deep you're willing to go to really,
You need one of a few arrangements of flip flop circuits to keep 1-bit state.
Going deeper, you need either NAND, or NOR gates(or a bunch of other ones) and connectors.
Even deeper, you'll require diodes or transistors to build the logic gates.
Beyond that is particle physics.
True; synchronous means existing or occurring at the same time (I really don't know if that's a question but oh well)
Answer:
Issue the reload command without saving the running configuration.
Explanation:
