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Appendix E: Understanding IP and IP addressing 155
Figure 32 Subnet mask: class B
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| CLASS B subnet masks |
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| IPNETWRK | ||||
| No. subnets |
| No. hosts |
| netmask |
| Netmask in binary format |
| subnet size | ||||
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| 2 | 16382 | 255.255.192.0 | (11111111.11111111.11000000.00000000) | 2 |
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| 6 | 8190 | 255.255.224.0 | (11111111.11111111.11100000.00000000) | 3 |
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| 14 | 4090 | 255.255.240.0 | (11111111.11111111.11110000.00000000) | 4 |
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| 30 | 2046 | 255.255.248.0 | (11111111.11111111.11111000.00000000) | 5 |
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| 62 | 1022 | 255.255.252.0 | (11111111.11111111.11111100.00000000) | 6 |
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| 126 | 510 | 255.255.254.0 | (11111111.11111111.11111110.00000000) | 7 |
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| 254 | 254 | 255.255.255.0 | (11111111.11111111.11111111.00000000) | 8 |
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| 510 | 126 | 255.255.255.128 | (11111111.11111111.11111111.10000000) | 9 |
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| 1022 | 62 | 255.255.255.192 | (11111111.11111111.11111111.11000000) | 10 |
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| 2046 | 30 | 255.255.255.224 | (11111111.11111111.11111111.11100000) | 11 |
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| 4094 | 14 | 255.255.255.240 | (11111111.11111111.11111111.11110000) | 12 |
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| 8190 | 6 | 255.255.255.248 | (11111111.11111111.11111111.11111000) | 13 |
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| 16382 | 2 | 255.255.255.252 | (11111111.11111111.11111111.11111100) | 14 |
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| Host/Router |
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| DMS | |||
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