D-Link DSL-300T User Manual - Page 59

Subnet Mask, IP Class

Page 59 highlights

DSL-300T ADSL Modem User's Guide Subnet Mask In the absence of subnetworks, standard TCP/IP addressing may be used by specifying subnet masks as shown below. IP Class Class A Class B Class C Subnet Mask 255.0.0.0 255.255.0.0 255.255.255.0 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 an a subnet mask that is to correspond to a net ID bit in the IP address must be set to 1. 49

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DSL-300T ADSL Modem User’s Guide
Subnet Mask
In the absence of subnetworks, 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 an 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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