ZyXEL MI-7248 User Guide - Page 284
Example Eight Subnets
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Appendix A IP Addresses and Subnetting Table 124 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 125 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 Highest Host ID: 192.168.1.190 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 128 10000000 11000000 LAST OCTET BIT VALUE 192 11000000 11000000 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 class C IP address last octet values for each subnet. Table 126 Eight Subnets SUBNET SUBNET ADDRESS FIRST ADDRESS LAST ADDRESS BROADCAST ADDRESS 1 0 1 30 31 2 32 33 62 63 3 64 65 94 95 4 96 97 126 127 5 128 129 158 159 6 160 161 190 191 7 192 193 222 223 8 224 225 254 255 The following table is a summary for class "C" subnet planning. Table 127 Class C Subnet Planning NO. "BORROWED" HOST BITS SUBNET MASK NO. SUBNETS 1 255.255.255.128 (/25) 2 2 255.255.255.192 (/26) 4 NO. HOSTS PER SUBNET 126 62 284 MS-7206 User's Guide