350-501 Architecture Practice Question
A service provider is deploying L3VPN. Which mechanism ensures that customer routes are isolated and not leaked between different customers?
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
✓
VRF
VRF (Virtual Routing and Forwarding) instances provide separate routing tables per customer, ensuring isolation in L3VPN.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Route target (RT)
Why it's wrong here
RT controls route import/export between VRFs.
- ✗
Route distinguisher (RD)
Why it's wrong here
RD makes routes unique but does not isolate them; VRF does.
- ✓
VRF
Why this is correct
Correct. VRF provides isolated routing tables per customer.
- ✗
MPLS labels
Why it's wrong here
Labels are used for forwarding, not route isolation.
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JA
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.