hardMultiple ChoiceObjective-mapped
CV0-004 Practice Question: A cloud architect manages a hybrid cloud…
A cloud architect manages a hybrid cloud environment where on-premises workloads are being migrated to a public cloud provider. The company uses a cloud-native container orchestration platform (e.g., Amazon EKS) for microservices. Recently, a critical application experienced intermittent connectivity failures between microservices during peak hours. The architect observes that the Kubernetes cluster uses a Calico network plugin with BGP peering to on-premises routers. The cluster nodes are spread across three Availability Zones, and the application pods communicate across zones. The architect also notes that the BGP session between the cluster and on-premises routers uses a single physical interface per node, and the on-premises routers have equal-cost multipath (ECMP) configured for the cluster node IPs. During peak hours, the on-premises routers experience high CPU utilization, and some BGP flaps occur. Which of the following is the MOST effective solution to improve connectivity reliability?
⚠ Common exam trap
Watch out — candidates often assume ECMP tuning (reducing or increasing paths) is the fix, but the root cause is the single physical interface creating a control-plane bottleneck and flap vulnerability, not the number of ECMP paths.
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
✓
Add a second physical interface on each cluster node and peer with multiple on-premises routers.
Adding a second physical interface per node enables redundant BGP peering with multiple on-premises routers, eliminating the single point of failure. This reduces BGP flap impact during peak hours by distributing control-plane load and providing failover paths, directly addressing the high CPU utilization and intermittent connectivity caused by ECMP instability.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Reduce the number of ECMP paths on the on-premises routers to lower CPU utilization.
Why it's wrong here
This may reduce CPU but does not address BGP flap issues; it can also cause uneven traffic distribution.
- ✗
Increase the number of ECMP paths to improve traffic distribution.
Why it's wrong here
More ECMP paths increase CPU load on routers and can worsen BGP flaps.
- ✓
Add a second physical interface on each cluster node and peer with multiple on-premises routers.
Why this is correct
This provides redundancy and reduces load per BGP session, minimizing flaps and improving reliability.
- ✗
Replace BGP with static routes between the cluster and on-premises network.
Why it's wrong here
Static routes are not scalable and require manual updates; they do not provide the dynamic routing needed for container workloads.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This CV0-004 practice question is part of Courseiva's free CompTIA 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 CV0-004 exam.