Example Eight Subnets - ZyXEL Communications ZYAIR G-4100 User Manual

IP Address
IP Address (Binary)
Subnet Mask (Binary)
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 0
2 32
3 64
4 96
5 128
6 160
7 192
8 224
The following table is a summary for class "C" subnet planning.
NO. "BORROWED" HOST BITS
1
2
IP Subnetting
Chart 9 Subnet 3
NETWORK NUMBER
192.168.1.
11000000.10101000.00000001.
11111111.11111111.11111111.
Lowest Host ID: 192.168.1.129
Highest Host ID: 192.168.1.190
Chart 10 Subnet 4
NETWORK NUMBER
192.168.1.
11000000.10101000.00000001.
11111111.11111111.11111111.
Lowest Host ID: 192.168.1.193
Highest Host ID: 192.168.1.254
Chart 11 Eight Subnets
FIRST ADDRESS LAST ADDRESS
1
33
65
97
129
161
193
225
Chart 12 Class C Subnet Planning
SUBNET MASK
255.255.255.128 (/25)
255.255.255.192 (/26)
ZyAIR G-4100 User's Guide
LAST OCTET BIT VALUE
128
10000000
11000000
LAST OCTET BIT VALUE
192
11000000
11000000
BROADCAST ADDRESS
30
62
94
126
158
190
222
254
NO. SUBNETS NO. HOSTS PER SUBNET
2
4
31
63
95
127
159
191
223
255
126
62
AA