D-Link WIRELESSADSLROUTER DSL-G604T - Manual (Page 87)

DSL-G604T 54Mbps Wireless ADSL2/2+ Modem/Router Manual
Subnet Mask
In the absence of sub networks, standard TCP/IP addressing may be used by specifying subnet masks
as shown below.
IP Class Subnet Mask
Class A 255.0.0.0
Class B 255.255.0.0
Class C 255.255.255.0
Subnet mask settings other than those listed above add significance to the interpretation of bits in the
IP address. The bits of the subnet mask correspond directly to the bits of the IP address. Any bit and a
subnet mask that is to correspond to a net ID bit in the IP address must be set to 1.
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