350-501 Architecture Practice Question
In a BGP/MPLS IP VPN, which technique ensures that customer traffic from different VPNs remains isolated on the same PE router?
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
✓
Virtual Routing and Forwarding (VRF)
VRF (Virtual Routing and Forwarding) provides separate routing tables per VPN on a PE router. MP-BGP carries VPN routes with labels, but isolation is achieved by VRF.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Virtual Routing and Forwarding (VRF)
Why this is correct
VRF maintains separate routing and forwarding tables per VPN.
- ✗
Route Target (RT)
Why it's wrong here
RT controls route import/export but not forwarding isolation.
- ✗
MPLS labels
Why it's wrong here
Labels are used for forwarding, not for isolation within the PE.
- ✗
Route Distinguisher (RD)
Why it's wrong here
RD makes routes unique but does not isolate forwarding.
Go deeper
Related to this question
About these practice questions
One of 971 original 350-501 practice questions on Courseiva, each with a full explanation and wrong-answer analysis — not exam dumps or protected exam content. Learn why practice questions differ from exam dumps →
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.