Example Eight Subnets; Table 159 Subnet 4; Table 160 Eight Subnets; Table 161 Class C Subnet Planning - ZyXEL Communications Prestige 661H Series User Manual

Prestige 661H/HW Series User's Guide

Table 159 Subnet 4

IP/SUBNET MASK
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.

Table 160 Eight Subnets

SUBNET
1
2
3
4
5
6
7
8
The following table is a summary for class "C" subnet planning.

Table 161 Class C Subnet Planning

NO. "BORROWED" HOST
BITS
1
2
3
4
5
6
7
449
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
SUBNET ADDRESS FIRST ADDRESS
0 1
32 33
64 65
96 97
128 129
160 161
192 193
224 225
SUBNET MASK
255.255.255.128 (/25)
255.255.255.192 (/26)
255.255.255.224 (/27)
255.255.255.240 (/28)
255.255.255.248 (/29)
255.255.255.252 (/30)
255.255.255.254 (/31)
LAST OCTET BIT VALUE
192
11000000
11000000
BROADCAST
LAST ADDRESS
ADDRESS
30 31
62 63
94 95
126 127
158 159
190 191
222 223
254 255
NO. HOSTS PER
NO. SUBNETS
SUBNET
2 126
4 62
8 30
16 14
32 6
64 2
128 1
Appendix C IP Subnetting