ZyXEL Communications MWR222 - V1.0 Manual page 238

Example: Eight Subnets
Similarly, use a 27-bit mask to create eight subnets (000, 001, 010, 011, 100,
101, 110 and 111).
The following table shows IP address last octet values for each subnet.
Table 88 Eight Subnets
SUBNET
SUBNET
ADDRESS
1 0
2 32
3 64
4 96
5 128
6 160
7 192
8 224
Subnet Planning
The following table is a summary for subnet planning on a network with a 24-bit
network number.
Table 89 24-bit Network Number Subnet Planning
NO. "BORROWED"
SUBNET MASK
HOST BITS
1 255.255.255.128 (/25)
MWR222 User's Guide
LAST
FIRST ADDRESS
ADDRESS
1 30
33 62
65 94
97 126
129 158
161 190
193 222
225 254
NO.
SUBNETS
2
238
BROADCAST
ADDRESS
31
63
95
127
159
191
223
255
NO. HOSTS PER
SUBNET
126