51 lines
3.6 KiB
Markdown
51 lines
3.6 KiB
Markdown
# Network Quick Reference
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## Class Quick Reference
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| **Class** | **Bits** | **Start** | **End** | **Networks** | **Default Mask** | **CIDR** |
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| --------- | -------- | --------- | --------------- | ------------:| ---------------- | -------- |
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| A | 0 | 0.0.0.0 | 127.255.255.255 | 128 | 255.0.0.0 | /8 |
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| B | 10 | 128.0.0.0 | 191.255.255.255 | 16384 | 255.255.0.0 | /16 |
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| C | 110 | 192.0.0.0 | 223.255.255.255 | 2097152 | 255.255.255.0 | /24 |
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| D (mcast) | 1110 | 224.0.0.0 | 239.255.255.255 | _undef_ | _undef_ | _undef_ |
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| E (rsrvd) | 1111 | 240.0.0.0 | 255.255.255.255 | _undef_ | _undef_ | _undef_ |
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## Netmask Quick Reference
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| **Bits** | **Total Hosts** | **Usable** | **Netmask** | **Inverse Mask** |
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| -------- | -----------------:| -----------| --------------- | ----------------:|
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| `/0` | 4294967296 (2^32) | 4294967294 | 0.0.0.0 | 255.255.255.255 |
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| `/1` | 2147483648 (2^31) | 2147483646 | 128.0.0.0 | 127.255.255.255 |
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| `/2` | 1073741824 (2^30) | 1073741822 | 192.0.0.0 | 63.255.255.255 |
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| `/3` | 536870912 (2^29) | 536870910 | 224.0.0.0 | 31.255.255.255 |
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| `/4` | 268435456 (2^28) | 268435454 | 240.0.0.0 | 15.255.255.255 |
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| `/5` | 134217728 (2^27) | 134217726 | 248.0.0.0 | 7.255.255.255 |
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| `/6` | 67108864 (2^26) | 67108862 | 252.0.0.0 | 3.255.255.255 |
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| `/7` | 33554432 (2^25) | 33554430 | 254.0.0.0 | 1.255.255.255 |
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| `/8` | 16777216 (2^24) | 16777214 | 255.0.0.0 | 0.255.255.255 |
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| `/9` | 8388608 (2^23) | 8388606 | 255.128.0.0 | 0.127.255.255 |
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| `/10` | 4194304 (2^22) | 4194302 | 255.192.0.0 | 0.63.255.255 |
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| `/11` | 2097152 (2^21) | 2097150 | 255.224.0.0 | 0.31.255.255 |
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| `/12` | 1048576 (2^20) | 1048574 | 255.240.0.0 | 0.15.255.255 |
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| `/13` | 524288 (2^19) | 524286 | 255.248.0.0 | 0.7.255.255 |
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| `/14` | 262144 (2^18) | 262142 | 255.252.0.0 | 0.3.255.255 |
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| `/15` | 131072 (2^17) | 131070 | 255.254.0.0 | 0.1.255.255 |
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| `/16` | 65536 (2^16) | 65534 | 255.255.0.0 | 0.0.255.255 |
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| `/17` | 32768 (2^15) | 32766 | 255.255.128.0 | 0.0.127.255 |
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| `/18` | 16384 (2^14) | 16382 | 255.255.192.0 | 0.0.63.255 |
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| `/19` | 8192 (2^13) | 8190 | 255.255.224.0 | 0.0.31.255 |
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| `/20` | 4096 (2^12) | 4094 | 255.255.240.0 | 0.0.15.255 |
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| `/21` | 2048 (2^11) | 2046 | 255.255.248.0 | 0.0.7.255 |
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| `/22` | 1024 (2^10) | 1022 | 255.255.252.0 | 0.0.3.255 |
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| `/23` | 512 (2^9) | 510 | 255.255.254.0 | 0.0.1.255 |
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| `/24` | 256 (2^8) | 254 | 255.255.255.0 | 0.0.0.255 |
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| `/25` | 128 (2^7) | 126 | 255.255.255.128 | 0.0.0.127 |
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| `/26` | 64 (2^6) | 62 | 255.255.255.192 | 0.0.0.63 |
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| `/27` | 32 (2^5) | 30 | 255.255.255.224 | 0.0.0.31 |
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| `/28` | 16 (2^4) | 14 | 255.255.255.240 | 0.0.0.15 |
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| `/29` | 8 (2^3) | 6 | 255.255.255.248 | 0.0.0.7 |
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| `/30` | 4 (2^2) | 2 | 255.255.255.252 | 0.0.0.3 |
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| `/31` | 2 (2^1) | 0 | 255.255.255.254 | 0.0.0.1 |
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| `/32` | 1 (2^0) | 1 | 255.255.255.255 | 0.0.0.0 |
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