Example eight subnets – ZyXEL Communications 10 User Manual
Page 439
ZyWALL 10~100 Series Internet Security Gateway
IP Subnetting
47
Subnet Address: 192.168.1.128 Lowest
Host ID: 192.168.1.129
Broadcast Address: 192.168.1.191
Highest Host ID: 192.168.1.190
Chart J-10 Subnet 4
NETWORK NUMBER
LAST OCTET BIT VALUE
IP Address
192.168.1.
192
IP Address (Binary)
11000000.10101000.00000001.
11000000
Subnet Mask (Binary)
11111111.11111111.11111111.
11000000
Subnet Address: 192.168.1.192 Lowest
Host ID: 192.168.1.193
Broadcast Address: 192.168.1.255
Highest Host ID: 192.168.1.254
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.
Chart J-11 Eight Subnets
SUBNET SUBNET ADDRESS
FIRST ADDRESS
LAST ADDRESS
BROADCAST ADDRESS
1 0
1
30
31
2 32
33
62
63
3 64
65
94
95
4 96
97 126
127
5 128
129 158
159
6 160
161 190
191
7 192
193 222
223
8 224
223 254
255
The following table is a summary for class “C” subnet planning.