Problem 2

Step 1. The problem statement tells us to use /23.

Step 2. The subnets would be,,,,, and so on, counting by 2 in the third octet.

Step 4. Three of the first four new possible subnets (,, and all overlap with existing subnets.

Step 5. is the numerically lowest new subnet number that does not overlap with the existing subnets.

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