I1 Module Test: Networking for Defenders
Test your understanding of network models, IPv4 and subnetting, ports and protocols, DNS and DHCP, firewalls, segmentation, diagrams, and integrated defensive analysis.
Lesson Progress
Module Test
High School Intermediate • I1: Networking for Defenders • Lesson 9 of 9
Readiness Check
Before You Begin
0/4 ready
Test Instructions
Complete all 25 questions in one focused attempt
Recommended process
- Read the full scenario or question.
- Identify the strongest evidence.
- Eliminate overconfident or unsafe choices.
- Select the most defensible answer.
- Submit only after all questions are answered.
Suggested score guide
23–25: Strong I1 mastery
20–22: Ready with targeted review
16–19: Review weak domains
0–15: Revisit the module lessons and labs
Domain Coverage
What this test measures
Questions 1–3
Network models and layered reasoning
Questions 4–8
IPv4 addressing, subnets, gateways, and evidence
Questions 9–13
Ports, protocols, services, and endpoint context
Questions 14–16
DNS, DHCP, NTP, and common services
Questions 17–20
Firewalls, rule quality, and least privilege
Questions 21–23
Segmentation and management access
Questions 24–25
Diagrams and integrated defensive analysis
Check Your Understanding
I1 Networking for Defenders Module Test
Choose your answers first. Explanations appear only after submission.
1. Why do defenders use the OSI and TCP/IP models?
2. Which OSI layer is most closely associated with IP addressing and routing?
3. What does successful DNS resolution prove?
4. What does /26 in 10.44.20.93/26 describe?
5. Which subnet contains 10.44.20.93/26?
6. What is the main purpose of a default gateway?
7. What may a 169.254.x.x address indicate?
8. Why can an IP address not prove every user action?
9. What is the main purpose of a network port?
10. Which statement best compares TCP and UDP?
11. Why can port 443 not prove traffic is trustworthy?
12. What is an ephemeral port?
13. Which evidence best connects a local program to a network connection?
14. Which record commonly includes an assigned address, gateway, DNS options, and lease window?
15. Why is NTP important to defenders?
16. What may NXDOMAIN mean?
17. Which firewall rule best follows least privilege?
18. What does a firewall allow event prove?
19. What is a shadowed firewall rule?
20. Why should temporary firewall rules expire?
21. What is the main purpose of network segmentation?
22. Why is a VLAN not a complete security control by itself?
23. Which management path is strongest?
24. What is diagram drift?
25. A managed device has the correct VLAN and successful DNS but receives an address from the wrong /26 scope and is denied as guest. What is the strongest next step?
Key Takeaways
What You Should Remember
Module Navigation