Wildcards & VLSM Allocation

Covers Lesson 3 and Lesson 4

Checks whether you can invert a mask correctly and turn a list of host requirements into a plan that neither overlaps nor wastes the block.

Topics covered

• Wildcard masks and what they match
• Sizing a subnet from its host requirement
• Largest-first allocation and subnet boundaries
• Overlap versus fragmentation

Every question here is answerable from the first-party notes of the lessons above. You commit to an answer before you see whether it was right.

This quiz is a Week 2 milestone in its own right. Passing it does not change the completion state of any individual lesson, and you do not need it to finish the lessons it covers.

Section quiz

Wildcards & VLSM Allocation

8 questions covering Lesson 3 and Lesson 4. Answer each one before you see whether you were right.

Question 1 of 8

1. What wildcard mask corresponds to a /26 subnet?

2. In a wildcard mask, what does a 0 bit require?

3. Which wildcard mask matches exactly one host?

4. What range does 172.16.8.64 with wildcard 0.0.0.31 match?

5. Which prefix is the smallest that fits a segment of 45 hosts?

6. A router-to-router link needs addresses for exactly two interfaces. Which prefix should it use?

7. Why does VLSM allocation start with the largest subnet?

8. A design places a /26 subnet with network address 192.168.1.32. What is wrong with it?

Back to Lesson 4 Continue to the Week 2 Checkpoint

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