SAA-C03 Design High-Performing Architectures Practice Question
A telemetry pipeline uses an Application Load Balancer in one Region. Global users need lower network latency to the application without caching dynamic responses. What should be considered?
⚠ Common exam trap
Candidates often confuse CloudFront (a CDN with caching) with Global Accelerator (a non-caching network accelerator), assuming any edge service must cache content, but Global Accelerator is designed specifically for dynamic and uncacheable traffic.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
AWS Global Accelerator
AWS Global Accelerator uses the Anycast IP address concept to route traffic through the AWS global network to the optimal endpoint, reducing latency and jitter for global users. It does not cache content, making it ideal for dynamic responses that cannot be cached, and it integrates directly with an Application Load Balancer in a single Region.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
AWS Global Accelerator
Why this is correct
AWS Global Accelerator uses static anycast IP addresses at AWS edge locations to accept TCP/UDP traffic and then forwards it over the AWS global backbone network to the optimal regional endpoint (e.g., an Application Load Balancer) rather than traversing the public internet. For a telemetry pipeline with many dynamic requests, this reduces latency, jitter, and packet loss while providing fast failover via health checks—benefits that come from network path optimization, not caching.
- ✗
S3 Cross-Region Replication
Why it's wrong here
S3 Cross-Region Replication (CRR) is an asynchronous background process that copies objects from a source bucket to a destination bucket in another region for compliance, backup, or disaster recovery. It does not intercept or route live application traffic, and clients do not automatically gain lower latency unless you add complex routing logic to point them at the replicated bucket. It also cannot optimize dynamic TCP/UDP flows from a telemetry pipeline, so it is fundamentally a storage-level durability feature, not a performance accelerator.
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CloudFront only with long TTLs
Why it's wrong here
CloudFront with long TTLs is designed for cacheable HTTP content, but telemetry pipeline traffic is often dynamic, unique, or time-sensitive, so long TTLs would serve stale or incorrect measurements to consumers. Although CloudFront can terminate TLS and provide some connection reuse, its primary performance win comes from caching responses at edge locations—which fails for requests that must reach the origin. For uncacheable, dynamic traffic, Global Accelerator is superior because it optimizes the network path without assuming content can be cached.
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AWS Backup cross-Region copy
Why it's wrong here
AWS Backup cross-Region copy creates point-in-time backup copies in a different region for disaster recovery and regulatory retention. These copies are dormant snapshots of data, not live endpoints, and restoring them requires explicit operator action and takes minutes to hours. They have no effect on in-flight telemetry ingestion or user latency; using them for performance would be like reading from an offline tape instead of a routing service.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This SAA-C03 practice question is part of Courseiva's free Amazon Web Services certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the SAA-C03 exam.