Appendix B IP Addresses and Subnetting
Table 109 Eight Subnets (continued)
SUBNET | SUBNET | FIRST ADDRESS | LAST | BROADCAST | |
ADDRESS | ADDRESS | ADDRESS | |||
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5 | 128 | 129 | 158 | 159 | |
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6 | 160 | 161 | 190 | 191 | |
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7 | 192 | 193 | 222 | 223 | |
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8 | 224 | 225 | 254 | 255 | |
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Subnet Planning
The following table is a summary for subnet planning on a network with a
Table 110
NO. “BORROWED” | SUBNET MASK | NO. SUBNETS | NO. HOSTS PER | |
HOST BITS | SUBNET | |||
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1 | 255.255.255.128 (/25) | 2 | 126 | |
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2 | 255.255.255.192 (/26) | 4 | 62 | |
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3 | 255.255.255.224 (/27) | 8 | 30 | |
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4 | 255.255.255.240 (/28) | 16 | 14 | |
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5 | 255.255.255.248 (/29) | 32 | 6 | |
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6 | 255.255.255.252 (/30) | 64 | 2 | |
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7 | 255.255.255.254 (/31) | 128 | 1 | |
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The following table is a summary for subnet planning on a network with a
Table 111
NO. “BORROWED” | SUBNET MASK | NO. SUBNETS | NO. HOSTS PER | |
HOST BITS | SUBNET | |||
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1 | 255.255.128.0 (/17) | 2 | 32766 | |
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2 | 255.255.192.0 (/18) | 4 | 16382 | |
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3 | 255.255.224.0 (/19) | 8 | 8190 | |
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4 | 255.255.240.0 (/20) | 16 | 4094 | |
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5 | 255.255.248.0 (/21) | 32 | 2046 | |
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6 | 255.255.252.0 (/22) | 64 | 1022 | |
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7 | 255.255.254.0 (/23) | 128 | 510 | |
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8 | 255.255.255.0 (/24) | 256 | 254 | |
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9 | 255.255.255.128 (/25) | 512 | 126 | |
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10 | 255.255.255.192 (/26) | 1024 | 62 | |
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11 | 255.255.255.224 (/27) | 2048 | 30 | |
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12 | 255.255.255.240 (/28) | 4096 | 14 | |
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13 | 255.255.255.248 (/29) | 8192 | 6 | |
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| 247 |
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