300-320 Question #570: Real Exam Question with Answer & Explanation

The correct answer is A: STP. Cisco FabricPath is a data center fabric technology based on TRILL (Transparent Interconnection of Lots of Links) that uses IS-IS routing at Layer 2 to create a loop-free multi-path topology. In a traditional Layer 2 network, STP (Spanning Tree Protocol) and MST (Multiple Spannin

Question

A new data center fabric is designed, which to protocols can be replaced when using FabricPath to create a loop-free topology? (Choose two)

Options

ASTP
BGLBP
CLACP
DHSRP
EMST

Explanation

Cisco FabricPath is a data center fabric technology based on TRILL (Transparent Interconnection of Lots of Links) that uses IS-IS routing at Layer 2 to create a loop-free multi-path topology. In a traditional Layer 2 network, STP (Spanning Tree Protocol) and MST (Multiple Spanning Tree) are used to prevent loops by blocking redundant links. FabricPath eliminates the need for both by using IS-IS to build a loop-free topology while allowing all links to remain active and forward traffic - something STP and MST cannot do. Options B (GLBP) and D (HSRP) are First-Hop Redundancy Protocols (FHRPs) for default gateway redundancy, which FabricPath does not replace. Option C (LACP) is a link aggregation protocol and is unrelated to loop prevention at the fabric level.

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