350-601 Network Practice Question
An engineer needs to extend a Layer 2 VLAN across a VXLAN EVPN fabric. Which construct maps the VLAN to the overlay network?
⚠ Common exam trap
Cisco often tests the distinction between VLAN ID (local significance) and VNI (global overlay identifier), and the trap here is that candidates confuse the VTEP IP (the tunnel endpoint) with the VNI (the network identifier), or think VPC plays a role in overlay mapping.
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
✓
VNI
In a VXLAN EVPN fabric, the VNI (VXLAN Network Identifier) is the construct that maps a Layer 2 VLAN to the overlay network. The VNI uniquely identifies a Layer 2 segment across the underlay, allowing VLAN traffic to be encapsulated and transported over the IP fabric. This mapping is configured on the VTEP (VXLAN Tunnel Endpoint) using commands like 'vlan 100' mapped to 'vn-segment 10100' under the VLAN configuration.
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 ID
Why it's wrong here
VLAN ID is local to a switch; VNI is the overlay identifier.
- ✗
VTEP IP
Why it's wrong here
VTEP IP identifies the tunnel endpoint.
- ✓
VNI
Why this is correct
Correct: VNI maps to the VLAN.
- ✗
VPC
Why it's wrong here
VPC provides redundancy, not overlay mapping.
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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.