So it can hold 2^48 MAC addresses in all. MAC addresses of these virtual network adapters are of same length and format. For example, Windows dial-up networking and VPN clients use virtual MAC addresses. Besides, windows also maintains one or more MAC addresses, which are not associated with hardware cards. Since, the address is registered and encoded by the manufacturer is it also known as hardware address. One MAC address exists for each installed hardware that has a network interface card (NIC). MAC is the acronym for Media Access Control Address which is nothing but an identifying unique address assigned to a computer for communication over physical networks.
This article will help you to find MAC address in Windows 8 / Windows 8.1.