Azure App Service Zone-Redundant Redundancy
Short answer
C Scale up the existing App Service plan for App1 to the Premium v3 tier.
Question
You need to recommend a redundancy solution for App1. The solution must meet the following requirements:
• Ensure that App1 is available if two availability zones fail.
• Minimize administrative effort.
• Minimize costs.
What should you recommend?
Key Takeaways
The core concept tested is identifying that Premium v3 is the most cost-effective tier supporting Availability Zones. The common trap is selecting ASE v3, which offers higher isolation but violates the 'minimize costs' requirement due to its high base infrastructure fee.
This question explores how to achieve high availability for an Azure App Service app using Availability Zones while minimizing cost and administrative effort. The correct solution is to upgrade the existing plan to Premium v3, which natively supports zone-redundant deployments.
Common mistake: Learners often select Option D (ASE v3) because it provides strong isolation and zone redundancy. However, ASE v3 is significantly more expensive than Premium v3 and requires redeployment, making it the wrong choice when cost and administrative effort are prioritized.
Expert Analysis
Why the Answer Is Correct
Option C is the correct recommendation because the Premium v3 tier of the Azure App Service Plan explicitly supports Availability Zones. Upgrading from Standard to Premium v3 allows you to enable zone redundancy without changing the deployment model or incurring the massive fixed costs associated with ASE. This meets all requirements: it ensures availability across zones, minimizes administrative effort by keeping the same app structure, and minimizes costs compared to ASE.
Why the Other Options Are Wrong
Option A is incorrect because scaling out within a single region does not guarantee protection against zone failures unless zone redundancy is explicitly configured and supported by the tier; Standard plans do not support this. Option B involves creating a new plan and redeploying, which adds unnecessary administrative effort compared to simply upgrading the existing plan's tier (Option C). Option D (ASE v3) provides zone redundancy but is the most expensive option listed, violating the 'minimize costs' requirement.
Community Comment Notes
Commenters like gpais note that while both Premium v3 and ASE v3 support zones, ASE carries a massive base infrastructure fee. Another commenter, Ras1364, points out that although ASE satisfies technical availability, it fails the exam logic regarding cost and administrative effort constraints.
Exam Strategy
When evaluating cloud architecture options, always map the explicit constraints (like 'minimize cost') to the pricing models of the services. Remember that newer tiers (like Premium v3) often bring enterprise features (like AZ support) to simpler deployment models before requiring complex environments like ASE.
Frequently Asked Questions
Does Standard App Service support Availability Zones?
Why not use ASE v3 for better isolation?
Discussion 2 contributions
Compiled from public community threads and reader submissions, lightly edited for clarity. Handles and vote tallies are shown as recorded, and comments reflect the views of individual contributors.
From public community threads 2
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Ras1364 👍 1 Answered CC and D are correct but Why D is NOT the best answer? Does ASE v3 work? Absolutely. ASE v3 provides: High availability Isolation Enterprise-scale deployment Zone-redundancy options So technically: ASE v3 satisfies the availability requirement Why ASE v3 fails the exam logic? The question explicitly says: Minimize administrative effort Minimize costs ASE v3 is: Most expensive option listed and Requires redeployment Therefore: Not the lowest-cost solution. Not the lowest-effort solution.
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gpais 👍 1 Answered BB.Both the Premium v3 tier and an App Service Environment v3 (ASEv3) support availability zones. However, an ASEv3 carries a massive base infrastructure fee, making it far more expensive. Since you must minimize costs, creating a standard zone-redundant Premium v3 App Service plan satisfies the architecture requirements at the lowest price point.
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