- A
ARP spoofing
Why wrong: ARP spoofing associates attacker's MAC with victim's IP.
- B
DNS poisoning
Why wrong: DNS poisoning corrupts DNS cache, not DHCP.
- C
DHCP spoofing
Why wrong: DHCP spoofing involves a rogue DHCP server, not exhaustion of IP pool.
- D
DHCP starvation
DHCP starvation exhausts the IP pool by sending many fake DHCP requests.
Question 523 of 1,000
SSCP Network and Communications Security Practice Question
This SSCP practice question tests your understanding of network and communications security. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
An attacker sends a large number of DHCP request messages with spoofed MAC addresses to a network's DHCP server, causing the server to exhaust its IP address pool and deny service to legitimate clients. This attack is known as:
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
DHCP starvation
DHCP starvation floods the DHCP server with fake requests to deplete the IP address pool.
Key principle: ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
ARP spoofing
Why it's wrong here
ARP spoofing associates attacker's MAC with victim's IP.
- ✗
DNS poisoning
- ✗
DHCP spoofing
Why it's wrong here
DHCP spoofing involves a rogue DHCP server, not exhaustion of IP pool.
- ✓
DHCP starvation
Why this is correct
DHCP starvation exhausts the IP pool by sending many fake DHCP requests.
Related concept
Standard ACLs match source addresses.
Common exam traps
Common exam trap: ACLs stop at the first match
ACLs are processed top to bottom. The first matching entry wins, and an implicit deny usually exists at the end.
Detailed technical explanation
How to think about this question
ACL questions test precision: source, destination, protocol, port and direction. A generally correct ACL can still fail if it is applied on the wrong interface or in the wrong direction.
KKey Concepts to Remember
- Standard ACLs match source addresses.
- Extended ACLs can match source, destination, protocol and ports.
- The first matching ACL entry is used.
- There is usually an implicit deny at the end.
TExam Day Tips
- Check inbound versus outbound direction.
- Read the ACL from top to bottom.
- Look for a broader permit or deny above the intended line.
Key takeaway
ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement.
Real-world example
How this comes up in practice
A security analyst at a medium-sized enterprise encounters this scenario during an investigation or architecture review. The correct answer reflects best practice for the specific threat or control described. ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement. Security exam questions test whether you can match controls to threats in context — not just recall definitions.
Visual reference
Quick reference
Access Control Model Comparison
| Model | Acronym | Who Controls Access? | Best For |
|---|---|---|---|
| Discretionary Access Control | DAC | Resource owner | Small teams, file shares |
| Mandatory Access Control | MAC | System / security labels | Classified govt / military |
| Role-Based Access Control | RBAC | Administrator (via roles) | Enterprise environments |
| Attribute-Based Access Control | ABAC | Policy engine (user + resource attributes) | Fine-grained, dynamic policies |
| Rule-Based Access Control | RuBAC | System rules / ACLs | Firewall rules, network ACLs |
What to study next
Got this wrong? Here's your next step.
Review ACL processing order, placement rules (standard near destination, extended near source), and inbound vs outbound direction. Study wildcard masks and implicit deny. Then practise related SSCP ACL questions on filtering logic and placement.
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FAQ
Questions learners often ask
What does this SSCP question test?
Network and Communications Security — This question tests Network and Communications Security — Standard ACLs match source addresses..
What is the correct answer to this question?
The correct answer is: DHCP starvation — DHCP starvation floods the DHCP server with fake requests to deplete the IP address pool.
What should I do if I get this SSCP question wrong?
Review ACL processing order, placement rules (standard near destination, extended near source), and inbound vs outbound direction. Study wildcard masks and implicit deny. Then practise related SSCP ACL questions on filtering logic and placement.
What is the key concept behind this question?
Standard ACLs match source addresses.
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Last reviewed: Jul 4, 2026
This SSCP practice question is part of Courseiva's free ISC2 certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the SSCP exam.
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