ZyXEL P-2812HNU-F1 User Guide - Page 295
Subnet Planning
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Appendix A IP Addresses and Subnetting The following table shows IP address last octet values for each subnet. Table 102 Eight Subnets SUBNET SUBNET ADDRESS 1 0 2 32 3 64 4 96 5 128 6 160 7 192 8 224 FIRST ADDRESS 1 33 65 97 129 161 193 225 LAST ADDRESS 30 62 94 126 158 190 222 254 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 103 24-bit Network Number Subnet Planning NO. "BORROWED" HOST BITS SUBNET MASK NO. SUBNETS 1 255.255.255.128 (/25) 2 2 255.255.255.192 (/26) 4 3 255.255.255.224 (/27) 8 4 255.255.255.240 (/28) 16 5 255.255.255.248 (/29) 32 6 255.255.255.252 (/30) 64 7 255.255.255.254 (/31) 128 NO. HOSTS PER SUBNET 126 62 30 14 6 2 1 The following table is a summary for subnet planning on a network with a 16-bit network number. Table 104 16-bit Network Number Subnet Planning NO. "BORROWED" HOST BITS SUBNET MASK NO. SUBNETS 1 255.255.128.0 (/17) 2 2 255.255.192.0 (/18) 4 3 255.255.224.0 (/19) 8 4 255.255.240.0 (/20) 16 5 255.255.248.0 (/21) 32 6 255.255.252.0 (/22) 64 7 255.255.254.0 (/23) 128 8 255.255.255.0 (/24) 256 9 255.255.255.128 (/25) 512 10 255.255.255.192 (/26) 1024 11 255.255.255.224 (/27) 2048 12 255.255.255.240 (/28) 4096 NO. HOSTS PER SUBNET 32766 16382 8190 4094 2046 1022 510 254 126 62 30 14 P-2812HNU(L)-Fx Series User's Guide 295