Addressing end devices is a recurring problem at all network levels. (a) (2 points) What is a Media Access Control (MAC) Address? (b) (2 points) Is it possible to guarantee that they are unique on a privately controlled local area network? Explain. (c) (2 points) Why are they not guaranteed to be unique on the open Internet? d) (4 points) When scaling addressing schemes such as MAC, or IP addresses to very large scale networks, why is it important that addresses are not allocated completely randomly