NETGEAR ME103 User Manual

Page 88

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Reference Manual for the ME103 802.11b ProSafe Wireless Access Point

C-6

Network, Routing, Firewall, and Cabling Basics

August 2003

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.

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

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

Table 6-1.

Netmask Notation Translation Table for One Octet

Number of Bits Dotted-Decimal Value

1

128

2

192

3

224

4

240

5

248

6

252

7

254

8

255

Table 6-2.

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

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