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SSCP Practice Question: Configures a VLAN hopping attack prevention by…
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?
⚠ Common exam trap
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.
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.
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.
- ✗
DHCP starvation
Why it's wrong here
DHCP starvation is mitigated by DHCP snooping.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.