B (OTV — Overlay Transport Virtualization): Allows Layer 2 extension across data centers while maintaining fault isolation by not extending STP across the WAN. Control plane handles MAC learning, which provides stability and loop avoidance between data centers.
Why other options are incorrect:
A: FabricPath is mainly for intra-data center Layer 2 fabric.
C: Advanced VPLS extends Layer 2 but carries STP across the WAN.
D: LISP operates at Layer 3, not for Layer 2 extension.
E: TRILL also focuses on intra-DC Layer 2 but not DCI fault isolation.
—
Contribute your Thoughts:
Chosen Answer:
This is a voting comment (?). You can switch to a simple comment. It is better to Upvote an existing comment if you don't have anything to add.
Submit