Example Eight Subnets - ZyXEL Communications 10 User Manual

Subnet Address: 192.168.1.128
Broadcast Address: 192.168.1.191
IP Address
IP Address (Binary)
Subnet Mask (Binary)
Subnet Address: 192.168.1.192
Broadcast Address: 192.168.1.255

Example Eight Subnets

Similarly use a 27-bit mask to create 8 subnets (001, 010, 011, 100, 101, 110).
The following table shows class C IP address last octet values for each subnet.
SUBNET SUBNET ADDRESS
1
2
3
4
5 128
6 160
7 192
8 224
The following table is a summary for class "C" subnet planning.
IP Subnetting
Chart J-10 Subnet 4
NETWORK NUMBER
192.168.1.
11000000.10101000.00000001.
11111111.11111111.11111111.
Chart J-11 Eight Subnets
FIRST ADDRESS
0
32
64
96
129
161
193
223
ZyWALL 10~100 Series Internet Security Gateway
Lowest Host ID: 192.168.1.129
Highest Host ID: 192.168.1.190
Lowest Host ID: 192.168.1.193
Highest Host ID: 192.168.1.254
LAST ADDRESS
1 30
33 62
65 94
97 126
158
190
222
254
LAST OCTET BIT VALUE
192
11000000
11000000
BROADCAST ADDRESS
31
63
95
127
159
191
223
255
47