ZyXEL P-871H User Guide - Page 93
Example Eight Subnets
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P-871H Series User's Guide Table 33 Subnet 4 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: 192.168.1.193 Highest Host ID: 192.168.1.254 LAST OCTET BIT VALUE 192 11000000 11000000 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 34 Eight Subnets SUBNET 1 2 3 4 5 6 7 8 SUBNET ADDRESS FIRST ADDRESS 0 1 32 33 64 65 96 97 128 129 160 161 192 193 224 223 LAST ADDRESS BROADCAST ADDRESS 30 31 62 63 94 95 126 127 158 159 190 191 222 223 254 255 The following table is a summary for class "C" subnet planning. Table 35 Class C Subnet Planning NO. "BORROWED" HOST BITS 1 2 3 4 5 6 7 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) NO. SUBNETS 2 4 8 16 32 64 128 NO. HOSTS PER SUBNET 126 62 30 14 6 2 1 92 IP Subnetting