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352-001 · Question #109
352-001 Question #109: Real Exam Question with Answer & Explanation
The correct answer is A: recommended for high availability. Dual hub, dual DMVPN cloud topology is recommended for high availability and is limited to single-tier headend architectures where each hub directly terminates all spoke tunnels.
Question
Which two aspects are considered when designing a dual hub, dual DMVPN cloud topology? (Choose two.)
Options
- Arecommended for high availability
- Brequires all sites to have dual Internet connections
- Cspoke-to-spoke traffic will transit the hub unless spokes exchange dynamic routing directly
- Dhub sites must connect to both DMVPN clouds
- Ewill only work with single-tier headend architecture
Explanation
Dual hub, dual DMVPN cloud topology is recommended for high availability and is limited to single-tier headend architectures where each hub directly terminates all spoke tunnels.
Common mistakes.
- B. Spokes do not require dual Internet connections - they connect to both DMVPN clouds for redundancy but can route both tunnel endpoints across a single uplink using different NHS addresses.
- C. With DMVPN Phase 2 or Phase 3, spokes can build direct spoke-to-spoke tunnels via NHRP resolution without transiting the hub, so hub transit is not a defining characteristic specific to the dual hub dual cloud topology.
- D. In a dual hub dual cloud design each hub serves as the NHS for its own dedicated cloud, not both clouds - it is the spokes that connect to both clouds to achieve redundancy.
Concept tested. Dual hub dual cloud DMVPN topology design principles
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