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350-401 · Question #346
350-401 Question #346: Real Exam Question with Answer & Explanation
The correct answer is C: VXLAN. VXLAN is a widely adopted network virtualization encapsulation protocol used by IaaS providers to extend Layer 2 networks over a Layer 3 infrastructure.
Submitted by manish99· Mar 6, 2026Virtualization
Question
Which solution do laaS service providers use to extend a Layer 2 segment across a Layer 3 network?
Options
- AVLAN
- BVTEP
- CVXLAN
- DVRF
Explanation
VXLAN is a widely adopted network virtualization encapsulation protocol used by IaaS providers to extend Layer 2 networks over a Layer 3 infrastructure.
Common mistakes.
- A. VLANs are used for segmenting broadcast domains within a single Layer 2 network and cannot natively extend a Layer 2 segment across a Layer 3 network.
- B. A VTEP (VXLAN Tunnel Endpoint) is a network device or software function that encapsulates and de-encapsulates VXLAN packets; it is a component of VXLAN, not the solution itself.
- D. VRF (Virtual Routing and Forwarding) creates independent routing tables for Layer 3 network segmentation, isolating routing instances rather than extending Layer 2 segments.
Concept tested. Network virtualization, VXLAN, Layer 2 over Layer 3
Reference. https://learn.microsoft.com/en-us/windows-server/networking/sdn/technologies/vxlan/vxlan-overview
Topics
#VXLAN#Layer 2 extension#Network virtualization#IaaS networking
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