Final VLSM Results for Widget Inc
After the third round of subnetting, you cannot use VLSM to subnet any further—a two-host subnet is the smallest you can make. The totals from all three rounds are listed in Table 1-9.
|
Round |
Subnets Created |
Subnets Set Aside |
Maximum Hosts per Subnet |
|
1 |
4 |
2 |
62 |
|
2 |
8 |
4 |
14 |
|
3 |
16 |
14 (2 wasted) |
2 |
The VLSM process yields a total of 20 deployable subnets of three different sizes and meets the stated requirements of Widget, Inc.
NOTE RFC 1219 describes a VLSM subnetting strategyjhat allows subnets to grow in size after they are deployed and also avoids address changes. See Appendix A for information on how to retrieve RFCs.
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