ZyXEL P-660HW-T1 v3 User Guide - Page 391
Example: Eight Subnets
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Appendix C IP Addresses and Subnetting Table 126 Subnet 3 IP/SUBNET MASK IP Address IP Address (Binary) Subnet Mask (Binary) Subnet Address: 192.168.1.128 Broadcast Address: 192.168.1.191 Table 127 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 NETWORK NUMBER 192.168.1. 11000000.10101000.00000001. 11111111.11111111.11111111. Lowest Host ID: 192.168.1.129 LAST OCTET BIT VALUE 128 10000000 11000000 Highest Host ID: 192.168.1.190 NETWORK NUMBER LAST OCTET BIT VALUE 192.168.1. 192 11000000.10101000.00000001 11000000 . 11111111.11111111.11111111 11000000 . Lowest Host ID: 192.168.1.193 Highest Host ID: 192.168.1.254 Example: Eight Subnets Similarly, use a 27-bit mask to create eight subnets (000, 001, 010, 011, 100, 101, 110 and 111). The following table shows IP address last octet values for each subnet. Table 128 Eight Subnets SUBNET SUBNET ADDRESS 1 0 2 32 3 64 4 96 5 128 6 160 7 192 8 224 FIRST ADDRESS LAST ADDRESS 1 30 33 62 65 94 97 126 129 158 161 190 193 222 225 254 BROADCAST ADDRESS 31 63 95 127 159 191 223 255 P-660HW-Tx v3 Series User's Guide 391