VMware Cloud on AWS Master Specialist Advanced Practice Exam: Hard Questions 2025

An enterprise is designing VMware Cloud on AWS (VMC) for a mission-critical 3-tier application. Requirements: (1) low-latency access from two on-prem data centers, (2) traffic between on-prem and VMC must remain private and deterministic, (3) minimize route complexity and overlapping RFC1918 networks exist across business units, and (4) enable future multi-SDDC expansion without redesign. Which architecture best meets these requirements?

A workload in VMC must access an AWS-native service privately (no Internet egress) while maintaining micro-segmentation controls in NSX. The security team requires that the AWS service see the original workload IPs (no SNAT), and the solution must support future access to multiple VPCs. Which approach is most appropriate?

During a design review, an architect proposes placing high-throughput east-west application tiers on separate NSX segments and relying on the Compute Gateway firewall for segmentation. The application requires line-rate east-west traffic with minimal latency and must maintain strict security boundaries between tiers. Which recommendation best meets performance and security requirements in VMC?

After enabling HCX Network Extension for a subnet, users report intermittent connectivity to migrated VMs and asymmetric routing is suspected. The on-prem network team confirms that return traffic for the extended subnet is sometimes routed locally on-prem instead of through HCX. Which corrective action is MOST appropriate to restore deterministic routing while keeping the subnet extended?

A security incident response team must rapidly isolate a suspected compromised VM in VMC while preserving evidence and ensuring no lateral movement occurs. The VM must remain powered on for memory capture, and management-plane connectivity (for admin tools) must remain available. What is the BEST approach?

A company uses Direct Connect and BGP to advertise on-prem routes into VMC. After adding a new on-prem summarized route, several VMC workloads lose connectivity to a specific on-prem subnet while other subnets remain reachable. Traceroutes from VMC show traffic going to the correct T0 but not reaching the destination subnet. Which is the MOST likely cause?

A migration wave uses HCX vMotion for hundreds of VMs. Midway through, the team observes increasing vMotion failures due to latency spikes, and the business requires minimal downtime. They cannot add bandwidth immediately. Which change is MOST effective to keep the wave on schedule while maintaining low downtime?

A customer plans to migrate an application that uses multicast for cluster coordination and also relies on promiscuous mode for a legacy packet-capture component. They want to move the workload into VMC with minimal refactoring. What is the BEST guidance?

After migrating, an application in VMC experiences sporadic timeouts to an on-prem database. Monitoring shows CPU/memory are normal, but packet captures indicate retransmissions and MSS/MTU-related issues. The connectivity is over IPSec VPN. What is the MOST likely remediation?

A VMC SDDC shows sudden drops in available capacity alarms and workload performance degradation. The administrator recently changed storage policies on several large VMs to a more resilient policy. Now vSAN reports increased resync activity and elevated congestion. What is the BEST immediate action to stabilize the environment while preserving data integrity?