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.
The destination of a packet can be further defined by using a unique port number. The port number is determined when the connection is established. The Internet Assigned Numbers Authority (IANA) defines the unique parameters and protocol values necessary for operation of the Internet and its future development.