350-601 Security Practice Question
An organization uses VXLAN EVPN for network segmentation. Which component provides per-tenant isolation of control plane traffic?
⚠ Common exam trap
Cisco often tests the distinction between data plane isolation (VNI) and control plane isolation (VRF), leading candidates to mistakenly choose VNI because it is the most visible segmentation identifier in VXLAN.
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
In VXLAN EVPN, per-tenant isolation of control plane traffic is achieved through the use of VRFs (Virtual Routing and Forwarding instances). Each tenant is assigned a unique VRF, which maintains its own separate routing table and forwarding decisions, ensuring that control plane information (such as MAC/IP routes advertised via MP-BGP EVPN) is isolated between tenants. This is distinct from data plane isolation, which is provided by VXLAN Network Identifiers (VNIs).
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
VLAN
Why it's wrong here
VLAN provides Layer 2 isolation, not control plane isolation in VXLAN.
- ✗
VNI
Why it's wrong here
VNI is the VXLAN identifier for data plane segmentation.
- ✗
VXLAN tunnel
Why it's wrong here
VXLAN tunnels encapsulate data traffic but do not provide control plane isolation.
- ✓
VRF
Why this is correct
VRF creates separate routing instances for each tenant, isolating control plane traffic.
Quick reference
Access Control Model Comparison
| Model | Acronym | Who Controls Access? | Best For |
|---|---|---|---|
| Discretionary Access Control | DAC | Resource owner | Small teams, file shares |
| Mandatory Access Control | MAC | System / security labels | Classified govt / military |
| Role-Based Access Control | RBAC | Administrator (via roles) | Enterprise environments |
| Attribute-Based Access Control | ABAC | Policy engine (user + resource attributes) | Fine-grained, dynamic policies |
| Rule-Based Access Control | RuBAC | System rules / ACLs | Firewall rules, network ACLs |
Go deeper
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 350-601 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 350-601 exam.