How to achieve 99.99% SLA for on-premises to GCP VPC connectivity?
You are responsible for designing a new connectivity solution between your organization's on-premises data center and your Google Cloud Virtual Private Cloud (VPC) network. Currently, there is no end-to-end connectivity. You must ensure a service level agreement (SLA) of 99.99% availability. What should you do?
Community Votes
66% of anonymous learners picked answer D. Votes are pick records left by other test-takers — they are not the verified answer.
Community Insight
Tests understanding of Google Cloud's SLA documentation for hybrid connectivity, highlighting the common trap that a single Dedicated Interconnect or HA VPN tunnel does not qualify for the 99.99% uptime guarantee without cross-metro or multi-gateway redundancy.
Achieving a 99.99% availability SLA for hybrid cloud connectivity requires strict redundancy across geographically diverse locations and network paths. The community consensus confirms that HA VPN with multi-interface tunnel configuration is the correct approach, as single-link Dedicated Interconnects fail to meet the required SLA thresholds.
Many candidates choose A or C, incorrectly assuming that any Dedicated Interconnect configuration automatically provides a 99.99% SLA. In reality, Google requires at least four connections spread across two distinct metropolitan areas to qualify for this tier.
Community Discussion (5 comments)
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Expert Analysis
Why the Answer Is Correct
HA VPN is explicitly engineered for high-availability enterprise scenarios. Configuring one tunnel from each interface of the VPN gateway to the corresponding on-premises interfaces creates truly active-active paths across independent network segments. When properly routed through a Cloud Router, this multi-interface design satisfies Google's architectural requirements for a 99.99% SLA.Why the Other Options Are Wrong
Options A and C propose Dedicated Interconnects confined to a single metropolitan area, which directly violates the geographic diversity mandate for top-tier availability. Option B relies on Direct Peering, which routes public internet traffic rather than establishing a private VPC link, and utilizes legacy Classic VPN technology. Neither alternative provides the necessary path independence or modern failover mechanisms required by the exam scenario.Community Comment Notes
Comment [1] accurately references Google's official guidance that Dedicated Interconnects must span two separate metropolitan areas to earn the 99.99% rating. Comment [3] initially questions the HA VPN SLA but overlooks that the prompt specifies multi-interface tunneling, which fulfills the redundancy criteria. Comments [2] and [5] demonstrate typical exam behavior where candidates validate the SLA matrix and confidently switch to D.Official Reference
Exam Strategy
Always cross-reference the requested SLA percentage with Google's official networking SLA matrix before selecting an architecture. If a scenario demands 99.99% uptime for hybrid connectivity, immediately eliminate single-link or single-metro designs and prioritize options that explicitly describe multi-path or multi-zone redundancy.
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