ZyXEL P-663HN User Guide - Page 260
Example: Eight Subnets, Subnet Planning, Table 86
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Appendix C IP Addresses and Subnetting Table 86 Subnet 4 (continued) IP/SUBNET MASK NETWORK NUMBER LAST OCTET BIT VALUE 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 eight subnets (000, 001, 010, 011, 100, 101, 110 and 111). The following table shows IP address last octet values for each subnet. Table 87 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 Subnet Planning The following table is a summary for subnet planning on a network with a 24-bit network number. Table 88 24-bit Network Number Subnet Planning NO. "BORROWED" HOST BITS SUBNET MASK NO. SUBNETS NO. HOSTS PER 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 1 260 P-663HN-51 User's Guide