Appendix A IP Addresses and Subnetting
Table 76 Subnet 4 (continued)
IP/SUBNET MASK | NETWORK NUMBER | LAST OCTET BIT | |
VALUE | |||
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| ||
Subnet Address: | Lowest Host ID: 192.168.1.193 |
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192.168.1.192 |
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| |
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| |
Broadcast Address: | Highest Host ID: 192.168.1.254 |
| |
192.168.1.255 |
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| |
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Example: Eight Subnets
Similarly, use a
The following table shows IP address last octet values for each subnet.
Table 77 | Eight Subnets |
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| |
SUBNET |
| SUBNET | FIRST ADDRESS | LAST | BROADCAST |
|
| ADDRESS |
| ADDRESS | ADDRESS |
1 |
| 0 | 1 | 30 | 31 |
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2 |
| 32 | 33 | 62 | 63 |
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3 |
| 64 | 65 | 94 | 95 |
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4 |
| 96 | 97 | 126 | 127 |
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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 78 24-bit Network Number Subnet Planning
NO. “BORROWED” | SUBNET MASK | NO. SUBNETS | NO. HOSTS PER |
HOST BITS |
|
| SUBNET |
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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