3V0-25.25 Sample Questions & Answers
Deploying NSX Federation, configuring components and standing up edge clusters carries the most weight, next to designing centralized versus distributed connectivity and multisite solutions, and troubleshooting NSX infrastructure, connectivity and routing problems.
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- Question 1Intermediate
Troubleshoot and Optimize the VMware Solution · Identify the Appropriate VCF Tool/Product to Troubleshoot an Issue in NSX
While troubleshooting a North-South connectivity issue for a specific tenant in a multi-tenant VCF environment, an administrator needs to determine if the packet is being dropped at the Distributed Router (DR) or the Service Router (SR) component of the Tier-1 Gateway.
Which tool should the administrator use to inject a synthetic packet and visualize the hop-by-hop path through the logical routers?
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Correct answer: D
NSX Traceflow is the specific tool designed to inject synthetic packets into the network and track their path hop-by-hop across logical switches and routers (DR and SR components). It reports exactly where a packet is dropped or modified (e.g., by a firewall rule or NAT).
- Question 2Intermediate
Plan and Design the VMware Solution · Design an NSX Connectivity Solution (Centralized vs Distributed)
A network architect is designing the upstream physical connectivity for an NSX Edge Cluster that will support high-bandwidth ECMP routing. The design requires that if a single Edge node fails, traffic should failover in less than one second. Which protocol must be configured between the Tier-0 Gateway and the physical routers to meet this requirement?
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Correct answer: B
Standard BGP keepalive timers are often too slow (default 60s/180s) to meet sub-second failover requirements. Bidirectional Forwarding Detection (BFD) is a high-speed protocol used in conjunction with BGP to detect link or neighbor failures in milliseconds, triggering a rapid routing convergence.
- Question 3Beginner
Install, Configure, Administrate the VMware Solution · Create NSX Tier-0 Gateway
An administrator is configuring a Tier-0 Gateway in a VCF 9.0 environment. The requirement is to maximize North-South throughput by utilizing all available paths across 4 Edge Nodes. Which High Availability (HA) mode must be selected to support Equal Cost Multi-Path (ECMP) routing?
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Correct answer: D
Active-Active HA mode is required to enable ECMP (Equal Cost Multi-Path) routing. In this mode, all Edge nodes in the cluster (up to 8) can forward traffic simultaneously, aggregating bandwidth. Active-Standby only allows one node to forward traffic at a time.
- Question 4Intermediate
Plan and Design the VMware Solution · Describe and Explain NSX Architecture and Components
A VCF architect is planning a deployment for a small remote branch office with limited hardware resources. The site requires full NSX functionality but has a constraint on the management footprint. Which VCF 9.0 supported deployment option should be chosen to minimize resource usage while maintaining functionality?
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Correct answer: A
VCF 9.0 introduces support for deploying a single NSX Manager node for environments with resource constraints or lower availability requirements (like edge sites). This reduces the management footprint compared to the standard 3-node cluster required in previous versions for all scenarios.
- Question 5Advanced
Install, Configure, Administrate the VMware Solution · Create NSX Tier-1 Gateway
An administrator is configuring a new Tier-1 Gateway in NSX. The gateway must support stateful NAT services for a tenant workload. However, after configuration, the administrator notices that the NAT rules are not being applied effectively. What is the most likely configuration omission?
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Correct answer: A
Tier-1 Gateways are distributed by default (DR only). To support stateful services like NAT, Load Balancing, or Gateway Firewall, a Service Router (SR) component must be instantiated. This requires explicitly assigning an Edge Cluster to the Tier-1 Gateway configuration.
- Question 6Intermediate
Install, Configure, Administrate the VMware Solution · Perform Operational Tasks in a VMware NSX Environment
During a maintenance window, an administrator needs to apply critical security patches to the NSX infrastructure in a VCF 9.0 environment without disrupting workload connectivity. Which feature should the administrator leverage to minimize downtime?
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Correct answer: B
VCF 9.0 leverages vSphere Lifecycle Manager (vLCM) Live Patching capabilities for NSX. This allows administrators to apply patches to the NSX kernel modules on ESXi hosts without requiring a host reboot or entering maintenance mode, significantly reducing disruption.
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