Overlapping VLSM Subnets – Speed Test 3
It’s time for the last #CCENT VLSM speed test for a while. Your job: any way you know how, derive the subnet IDs, and the range of addresses in each subnet, and then compare the subnets to identify which of the subnets have a range of addresses that overlaps with other subnets in the list. That’s it! Sounds simple, but it really shows how comfortable you are with subnetting math.
Before you do your first VLSM Subnet Speed Test, look at the following post first, which puts these questions in perspective. Here’s a complete list of related posts:
Tasks: Find the Range for Each Subnet; Then Find the Overlaps
The list shows IP addresses and masks. Derive the subnet IDs, and then identify which subnets overlap with each other. That is, if the subnets listed as #1 and #2 in the list overlap, list “1&2” as your answer.
- 172.16.15.1/23
- 172.16.17.131/25
- 172.16.9.131/22
- 172.16.20.241/30
- 172.16.12.1/22