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P-2302HW/HWL-P1 Series User’s Guide
Appendix C IP Addresses and Subnetting
307
The following table shows class C IP address last octet values for each subnet.
The following table is a summary for class “C” subnet planning.
Subnetting With Class A and Class B Networks.
For class “A” and class “B” addresses the subnet mask also determines which bits are part of
the network number and which are part of the host ID.
the network number and which are part of the host ID.
A class “B” address has two host ID octets available for subnetting and a class “A” address has
three host ID octets (see
three host ID octets (see
) available for subnetting.
Table 147 Eight Subnets
SUBNET
SUBNET ADDRESS FIRST ADDRESS
LAST ADDRESS
BROADCAST
ADDRESS
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
225
254
255
Table 148 Class C Subnet Planning
NO. “BORROWED” HOST
BITS
BITS
SUBNET MASK
NO. SUBNETS
NO. HOSTS PER
SUBNET
SUBNET
1
255.255.255.128 (/25)
2
126
2
255.255.255.192 (/26)
4
62
3
255.255.255.224 (/27)
8
30
4
255.255.255.240 (/28)
16
14
5
255.255.255.248 (/29)
32
6
6
255.255.255.252 (/30)
64
2
7
255.255.255.254 (/31)
128
1