350-501 Architecture Practice Question
What is the main benefit of using Q-in-Q (802.1ad) in metro Ethernet networks?
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
✓
Increases the number of available VLANs
Q-in-Q allows multiple customer VLANs to be encapsulated within a service provider VLAN, increasing scalability.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Increases the number of available VLANs
Why this is correct
Q-in-Q expands VLAN space.
- ✗
Simplifies routing
Why it's wrong here
It is a layer 2 feature.
- ✗
Provides encryption
Why it's wrong here
No encryption.
- ✗
Reduces latency
Why it's wrong here
No significant latency reduction.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 350-501 practice question is part of Courseiva's free Cisco 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 350-501 exam.