CIDR - VLSM - Cheet sheet
VLSM - CIDR - Cheet sheet
VLSM - Variable-length subnet mask CIDR - Classless Inter-Domain Routing
| CIDR |
Mask |
Block |
|---|---|---|
| /9 /17 /25 |
.128 |
128 |
| /10 /18 /26 |
.192 |
64 |
| /11 /19 /27 |
.224 |
32 |
| /12 /20 /28 |
.240 |
16 |
| /13 /21 /29 |
.248 |
8 |
| /14 /22 /30 |
.252 |
4 |
| /15 /23 /31 |
.254 |
2 |
| 2^x | |||
|---|---|---|---|
| 11 |
2048 |
18 |
262144 |
| 12 |
4096 |
19 |
524288 |
| 13 |
8192 |
20 |
1048576 |
| 14 |
16384 |
21 |
2097152 |
| 15 |
32768 |
22 |
4194304 |
| 16 |
65536 |
23 |
8388608 |
| 17 |
131072 |
24 |
16777216 |