D-Link 502G User Guide - Page 79

Subnet Mask

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DSL-502G ADSL Router User's Guide It is recommended that you choose private network IP Addresses from the above list. For more information on address assignment, refer to RFC 1597, Address Allocation for Private Internets and RFC 1466, Guidelines for Management of IP Address Space. 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. 67

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DSL-502G ADSL Router User’s Guide
67
It is recommended that you choose private network IP Addresses from the above list. For
more information on address assignment, refer to RFC 1597,
Address Allocation for Private
Internets
and RFC 1466,
Guidelines for Management of IP Address Space
.
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.