Week 2 Checkpoint

Covers all four Week 2 lessons

Confirms you can combine the week's separate skills into one worked answer. Every question needs at least two of them — conversion, boundaries, wildcards, allocation.

Topics covered

• Converting between binary, decimal, hex, prefixes, and masks
• Locating subnet boundaries from any address
• Counting subnets and usable hosts after borrowing bits
• Wildcards derived from the same block sizes
• Allocating and validating a VLSM plan

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.

Weekly checkpoint

Week 2 Checkpoint

12 questions covering all four Week 2 lessons. Answer each one before you see whether you were right.

Question 1 of 12

1. 192.168.10.0/24 is subnetted into /28s. How many subnets result, and how many usable hosts does each hold?

2. For the address 10.20.30.200 /27, what are the network and broadcast addresses?

3. A technician assigns 172.20.5.63 /26 to a workstation and it cannot communicate. Why?

4. Are 192.168.7.100 /27 and 192.168.7.130 /27 in the same subnet, and what follows from it?

5. What wildcard mask would match the whole subnet that contains 192.168.7.100 /27?

6. The mask 255.255.240.0 corresponds to which prefix, and how many usable hosts?

7. A mask's final octet is 11100000 in binary. What is that octet in decimal, and what is the full prefix?

8. Allocate 192.168.50.0/24 largest-first to three segments needing 120, 60, and 12 hosts. What is the network address of the third subnet?

9. Continuing that plan, what is the first free address after the third subnet?

10. How many /30 point-to-point subnets fit inside a single /24?

11. Which of these is NOT a valid network address for its stated prefix?

12. A /24 is currently split into four /26s. The design changes to /28s instead. What happens?

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