- A
STP manipulation
Why wrong: STP manipulation is mitigated by BPDU guard.
- B
ARP spoofing
Why wrong: ARP spoofing is mitigated by dynamic ARP inspection.
- C
MAC flooding
Why wrong: MAC flooding is mitigated by port security.
- D
DTP spoofing
DTP spoofing can turn an access port into a trunk, enabling VLAN hopping.
- E
DHCP starvation
Why wrong: DHCP starvation is mitigated by DHCP snooping.
Question 610 of 1,000
hardMultiple ChoiceObjective-mapped
SSCP Practice Question: Configures a VLAN hopping attack prevention by…
This SSCP practice question tests your understanding of sscp exam topics. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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.
A network engineer configures a VLAN hopping attack prevention by setting all unused switch ports to an unused VLAN and disabling trunking. What vulnerability is being mitigated?
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
✓
DTP spoofing
DTP spoofing is the correct answer because VLAN hopping attacks often exploit Dynamic Trunking Protocol (DTP) to negotiate a trunk link between a switch and an attacker's device, allowing the attacker to send and receive traffic on multiple VLANs. By disabling trunking on all unused ports and assigning them to an unused VLAN, the switch will not respond to DTP negotiation requests, preventing unauthorized trunk establishment.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
STP manipulation
Why it's wrong here
STP manipulation is mitigated by BPDU guard.
- ✗
ARP spoofing
Why it's wrong here
ARP spoofing is mitigated by dynamic ARP inspection.
- ✗
MAC flooding
Why it's wrong here
MAC flooding is mitigated by port security.
- ✓
DTP spoofing
Why this is correct
DTP spoofing can turn an access port into a trunk, enabling VLAN hopping.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
DHCP starvation
Why it's wrong here
DHCP starvation is mitigated by DHCP snooping.
Common exam traps
Common exam trap: answer the scenario, not the keyword
ISC2 often tests the distinction between DTP spoofing (VLAN hopping via trunk negotiation) and double-tagging attacks (another VLAN hopping method), so candidates may confuse the two or incorrectly associate VLAN hopping with MAC flooding or ARP spoofing.
Detailed technical explanation
How to think about this question
DTP is a Cisco proprietary protocol that operates on Layer 2 and uses frames with destination MAC 01:00:0C:CC:CC:CC to negotiate trunking. An attacker can send a DTP Desirable or Dynamic Auto frame to a switch port set to Dynamic Desirable or Dynamic Auto, causing the port to become a trunk and allowing the attacker to access all VLANs. Disabling trunking with the 'switchport mode access' command and setting the port to an unused VLAN prevents this negotiation entirely.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A security team runs a vulnerability scan on a web application and discovers an unpatched SQL injection flaw. The team prioritises remediation by CVSS score — critical flaws are patched within 24 hours, high within 7 days. Questions like this test whether you understand vulnerability management processes, scanning tools, and remediation prioritisation.
Visual reference
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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FAQ
Questions learners often ask
What does this SSCP question test?
Read the scenario before looking for a memorised answer.
What is the correct answer to this question?
The correct answer is: DTP spoofing — DTP spoofing is the correct answer because VLAN hopping attacks often exploit Dynamic Trunking Protocol (DTP) to negotiate a trunk link between a switch and an attacker's device, allowing the attacker to send and receive traffic on multiple VLANs. By disabling trunking on all unused ports and assigning them to an unused VLAN, the switch will not respond to DTP negotiation requests, preventing unauthorized trunk establishment.
What should I do if I get this SSCP question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 30, 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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