Purchasing power parity (PPP) is an economic theory that states that the exchange rate between two currencies is equal to the ratio of the currencies' respective purchasing power.
MAC Address Generation. Each virtual network adapter in a virtual machine is assigned its own unique MAC address. Each network adapter manufacturer is assigned a unique three-byte prefix called an Organizationally Unique Identifier (OUI), which it can use to generate unique MAC addresses.
Follow these guidelines when assigning a network ID: 1  The network ID must be unique to the IP internetwork. 2  The network ID cannot begin with the number 127. 3  All bits within the network ID cannot be set to 1. 4  All bits within the network ID cannot be set to 0.