Validating identity wireless router
The MAC address is the address of the physical network interface card inside the device, and never changes for the life of the device.
The IP address can change if the machine moves to another part of the network or the network uses , an IP address to its appropriate MAC address (and vice versa).
A shortcut that enables a user to identify a group of hosts, networks, or users under one name.
Aliases are used to speed user authentication and service configuration.
Access control is often accomplished by creating a list specifying the IP addresses and/or ports from which permitted traffic can come.