Medium1 markMultiple Choice
Domain 2: Managing and Provisioning a Solution InfrastructureDomain 2Cloud InterconnectHybrid NetworkingCase Study
This question is part of a case study — click to read the full scenario(Case 06)

CASE STUDY: TrendWear Apparel

Company Overview:
TrendWear Apparel is a global clothing retailer with an e-commerce platform and 500 physical stores.

Current Technical Environment:

  • On-premises VMware environment
  • Legacy IBM Mainframe for core inventory management
  • Monolithic e-commerce application running on VMs

Business Requirements:

  • Modernize the e-commerce platform to handle Black Friday (10x normal traffic)
  • Unify online and in-store inventory data in real-time
  • Avoid major capital expenditure (CapEx) for data center refreshes

Executive Statements:

  • CEO: "We need an omnichannel experience. Customers should see accurate store inventory online."
  • CFO: "We must shift from CapEx to OpEx. No more buying hardware."
  • CTO: "We want to move to microservices, but we cannot retire the mainframe for at least 3 years due to complex legacy dependencies."

Technical Requirements:

  • Hybrid architecture connecting GCP and on-premises
  • Microservices architecture for the new e-commerce platform
  • PCI-DSS compliance for all payment processing
  • Consistent management plane across on-prem and cloud

Constraints:

  • Mainframe must remain on-premises
  • E-commerce migration must be completed before the next holiday season (8 months)

QUESTION:
Based on the CTO's requirement for a consistent management plane across on-premises and the cloud, and the need to modernize to microservices while keeping the mainframe, which compute architecture should you recommend?

GCP PCA · Question 07 · Domain 2: Managing and Provisioning a Solution Infrastructure

CASE STUDY: TrendWear Apparel

Company Overview:
TrendWear Apparel is a global clothing retailer with an e-commerce platform and 500 physical stores.

Current Technical Environment:

  • On-premises VMware environment
  • Legacy IBM Mainframe for core inventory management
  • Monolithic e-commerce application running on VMs

Business Requirements:

  • Modernize the e-commerce platform to handle Black Friday (10x normal traffic)
  • Unify online and in-store inventory data in real-time
  • Avoid major capital expenditure (CapEx) for data center refreshes

Executive Statements:

  • CEO: "We need an omnichannel experience. Customers should see accurate store inventory online."
  • CFO: "We must shift from CapEx to OpEx. No more buying hardware."
  • CTO: "We want to move to microservices, but we cannot retire the mainframe for at least 3 years due to complex legacy dependencies."

Technical Requirements:

  • Hybrid architecture connecting GCP and on-premises
  • Microservices architecture for the new e-commerce platform
  • PCI-DSS compliance for all payment processing
  • Consistent management plane across on-prem and cloud

Constraints:

  • Mainframe must remain on-premises
  • E-commerce migration must be completed before the next holiday season (8 months)

QUESTION:
The new e-commerce microservices in GCP must query the on-premises mainframe for real-time inventory. This requires high bandwidth, low latency, and an enterprise-grade SLA. Which networking solution should you implement?

Answer options:

A.

HA VPN over the public internet.

B.

Dedicated Interconnect.

C.

Carrier Peering.

D.

VPC Network Peering.

How to approach this question

Identify the connectivity requirements: hybrid (GCP to on-prem), high bandwidth, low latency, SLA. Dedicated Interconnect is the premium hybrid connectivity option that meets all these criteria.

Full Answer

B.Dedicated Interconnect.✓ Correct
Dedicated Interconnect.
Cloud Interconnect (specifically Dedicated Interconnect) provides direct physical connections between your on-premises network and Google's network. This bypasses the public internet entirely, ensuring consistent low latency and high throughput, which is critical when cloud applications must synchronously query legacy on-premises mainframes.

Common mistakes

Selecting HA VPN (A) is common because it's cheaper and faster to set up, but it relies on the public internet, which is subject to unpredictable latency spikes.

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