In a multi-tenant Data Center

Question

Options

• AVRF offers Layer 3 isolation for the tenants
• BMSTP offers Layer 2 isolation along with loop prevention
• CVRF offers Layer 2 isolation for the tenants
• DVLANs offer Layer 3 isolation for the tenants

• A
  91% (30)
• B
  6% (2)
• D
  3% (1)

Explanation

VRF (Virtual Routing and Forwarding) provides Layer 3 isolation by creating separate, independent routing tables for each tenant - traffic between tenants cannot leak even if they share the same physical infrastructure, making it the correct choice for multi-tenant environments.

Why the distractors are wrong:

• B is partially true (MSTP does prevent loops), but MSTP is a spanning tree protocol variant - it operates at Layer 2 and does not provide tenant isolation; it just manages redundant links.
• C is wrong because VRF operates at Layer 3 (the IP/routing layer), not Layer 2. Layer 2 isolation is handled by VLANs or similar mechanisms.
• D flips the layers - VLANs provide Layer 2 isolation (segmenting broadcast domains), not Layer 3.

Memory tip: Think "V-R-F = Virtual Routing and Forwarding" - the word Routing anchors it to Layer 3. Conversely, "VLAN = Virtual LAN" - a LAN is a Layer 2 concept, so VLANs stay at Layer 2.

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