NETGEAR WGT624 manual Netmask Notation Translation Table for One Octet

Reference Manual for the 108 Mbps Wireless Firewall Router WGT624

The following table lists the additional subnet mask bits in dotted-decimal notation. To use the table, write down the original class netmask and replace the 0 value octets with the dotted-decimal value of the additional subnet bits. For example, to partition your Class C network with subnet mask 255.255.255.0 into 16 subnets (4 bits), the new subnet mask becomes 255.255.255.240.

Table 7-1. Netmask Notation Translation Table for One Octet

Number of Bits Dotted-Decimal Value

1128

2192

3224

4240

5248

6252

7254

8255

The following table displays several common netmask values in both the dotted-decimal and the masklength formats.

Table 7-2. Netmask Formats

Dotted-Decimal Masklength

255.0.0.0/8

255.255.0.0/16

255.255.255.0 /24

255.255.255.128 /25

255.255.255.192 /26

255.255.255.224 /27

255.255.255.240 /28

255.255.255.248 /29

255.255.255.252 /30

255.255.255.254 /31

255.255.255.255 /32

Configure all hosts on a LAN segment to use the same netmask for the following reasons:

B-6 Network, Routing, Firewall, and Basics

M-10153-01