GCP Professional Cloud Architect Practice Question
An e-commerce company will migrate its application tier to Google Cloud but keep two on-premises data-center databases for the next 18 months. The databases exchange about 15 Gbps of sustained traffic today and must scale to at least 25 Gbps within 12 months. The business requires the lowest possible latency and a 99.99 % availability SLA for the hybrid link. Dynamic exchange of routes with the on-premises routers is mandatory. Which connectivity design best meets these requirements?
Deploy a single 10-Gbps Dedicated Interconnect circuit shared by both data centers using static routes.
Build four HA Cloud VPN tunnels (two per data center) and enable dynamic routing with Cloud Router.
Provision two geographically diverse 100-Gbps Dedicated Interconnect circuits and create redundant HA VLAN attachments to a Cloud Router at each location.
Order Partner Interconnect links through a service provider with two 10-Gbps VLAN attachments per data center and advertise routes with Cloud Router.
Two physically diverse Dedicated Interconnect circuits give private, low-latency connectivity that can scale in 10- or 100-Gbps increments. Using a pair of circuits and creating redundant VLAN attachments qualifies the deployment for the 99.99 % SLA. Attaching each VLAN to a Cloud Router establishes BGP sessions, satisfying the dynamic routing requirement. Cloud VPN cannot provide the needed bandwidth or latency, Partner Interconnect tops out at 50 Gbps per VLAN but a single service provider cannot offer more than 10 Gbps per VLAN in many regions, and a single Dedicated Interconnect link would not meet either the capacity target or the high-availability SLA.
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What is a Dedicated Interconnect circuit, and why is it used for hybrid connectivity?
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What is a Cloud Router and how does it enable dynamic routing?
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Why is latency and availability critical in hybrid cloud setups?
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What is Dedicated Interconnect in Google Cloud?
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How does Cloud Router enable dynamic routing?
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Why is high availability important in hybrid connectivity solutions?
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GCP Professional Cloud Architect
Managing and provisioning a solution infrastructure
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