All matter is composed of atoms which contain electrons that orbit around a nucleus made of protons and neutrons. Voltage is created by separating electrons and protons and can also be generated through friction, magnetism, or light. Resistance opposes the flow of electrons in circuits with conductors offering little resistance and insulators severely restricting current. Current is the flow of electrons from the negative terminal along a circuit to the positive terminal. Wireless LAN standards issued by IEEE use technologies like DSSS and operate using authentication, association and encryption to secure connections between devices and access points.