There are four methods of adding an IP Address to the list:
Single IP: Each individual device IP can be specified.
Range of IP (within a subnet): An inclusive range of IP Addresses. The beginning and ending are specified arbitrarily.
Subnet (using Mask): An inclusive range of IP Addresses specified by the Subnet Mask. All valid subnet masks are supported in this mode.
Subnet (Wild card): An inclusive range of IP Addresses specified by a Wild card. Only Class B (255.255.0.0) or Class C (255.255.255.0) are supported in this mode.