ANS-C01 Network Implementation Practice Question
A company is deploying a multi-region application with an Application Load Balancer (ALB) in us-east-1 and a second ALB in eu-west-1. They want to route traffic to the nearest region using Amazon Route 53. They have set up a latency-based routing policy. Users in North America are being routed to eu-west-1 instead of us-east-1. What is the most likely cause?
⚠ Common exam trap
It's easy for candidates to assume latency-based routing always routes to the geographically closest region, but it actually routes based on measured network latency, which can be affected by transient conditions, not just physical distance.
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
✓
Latency measurements between the user and us-east-1 are higher than expected due to transient network conditions
Latency-based routing in Route 53 selects the region with the lowest measured latency for the user. If transient network conditions cause higher-than-normal latency between the user and us-east-1, Route 53 may route traffic to eu-west-1 despite the geographic proximity. This is the most likely cause because the question states the routing policy is already set to latency, and transient conditions can skew measurements.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The routing policy is incorrectly configured as geolocation instead of latency
Why it's wrong here
Configuration is latency-based.
- ✗
The us-east-1 ALB is not associated with a Route 53 record set
Why it's wrong here
It is associated; otherwise no routing would occur.
- ✗
The health checks for the us-east-1 ALB are failing
Why it's wrong here
No indication of health check failure.
- ✓
Latency measurements between the user and us-east-1 are higher than expected due to transient network conditions
Why this is correct
Latency-based routing uses measured latency; higher latency can cause routing to other region.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This ANS-C01 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 ANS-C01 exam.