3V0-42.23 Exam Questions and Answers

QUESTION: 9

A Solutions Architect has been tasked with designing a comprehensive security policy methodology for a large financial institution. The institution has multiple departments and requires strict segregation of network traffic to ensure data confidentiality and regulatory compliance. The security policy should provide granular control over network traffic and enforce consistent security measures across the entire infrastructure.

Which feature of the NSX security policy should the architect recommend to achieve regulatory compliance for the financial institution?

Intrusion Detection and Prevention
Identity-Based Firewalling
Micro-Segmentation
Network Introspection

Answer(s): C

Explanation:

Micro-Segmentation for Granular Security (Correct Answer - C):

Micro-segmentation in NSX-T enables granular firewall policies at the workload level, ensuring strict segregation of traffic across different departments.

It allows zero trust security, ensuring only authorized communications occur between workloads, reducing attack surfaces.

This is particularly critical for financial institutions that need regulatory compliance (e.g., PCI-DSS, GDPR, ISO 27001).

Incorrect Options:

(A - Intrusion Detection & Prevention - IDS/IPS):

IDS/IPS provides threat detection, but it does not segment workloads or enforce access control.

(B - Identity-Based Firewalling):

NSX Identity Firewall (IDFW) can be useful for user-based policies but is not a replacement for network segmentation.

(D - Network Introspection):

NSX Network Introspection is used for third-party security integrations, not as a primary segmentation strategy.

VMware NSX 4.x

Reference:

VMware NSX-T Security Reference Guide

Micro-Segmentation Best Practices in NSX-T

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QUESTION: 10

A company is planning to deploy NSX to provide a multi-tenant environment for their customers. The solutions architect is responsible for designing the network services to ensure that each tenant's traffic is isolated and secure.

Which of the following NSX features should the solutions architect use to achieve this goal?

Load Balancing
VLAN
NAT
Distributed Firewall

Answer(s): D

Explanation:

Distributed Firewall for Multi-Tenant Security (Correct Answer - D):

NSX Distributed Firewall (DFW) enables tenant isolation at the virtual machine level.

It enforces security policies directly on vNICs, ensuring East-West traffic control without needing hardware firewalls.

This ensures multi-tenancy compliance, preventing cross-tenant communication unless explicitly allowed.

Incorrect Options:

(A - Load Balancing):

NSX Load Balancer improves application availability but does not provide traffic isolation.

(B - VLAN):

VLANs provide basic segmentation but do not offer granular control like DFW.

(C - NAT):

NAT provides IP address translation but does not ensure tenant security.

VMware NSX 4.x

Reference:

NSX-T Data Center Multi-Tenancy Design Guide

NSX-T Distributed Firewall Best Practices

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QUESTION: 11

Which three VMware guidelines are recommended when designing VLANs and subnets for a single region and single availability zone? (Choose three.)

Use the RFC1918 IPv4 address space for these subnets and allocate one octet by region and another octet by function.
Use the RFC2460 IPv6 address space for these subnets and allocate one set by region and another set by function.
Use only /16 subnets to reduce confusion and mistakes when handling IPv4 subnetting.
Use only /24 subnets to reduce confusion and mistakes when handling IPv4 subnetting.
Use the IP address of the floating interface for Virtual Router Redundancy Protocol (VRRP) or Hot Standby Routing Protocol (HSRP) as the gateway.

Answer(s): A,D,E

Explanation:

Recommended Network Design Guidelines:

(A - Use RFC1918 Addressing):

VMware NSX-T recommends using RFC1918 private address space for internal networks to avoid public address conflicts.

(D - Use /24 Subnets):

/24 subnets are preferred as they provide 256 usable IPs, simplifying management and subnetting.

(E - Floating Interface for VRRP/HSRP):

NSX Gateway HA uses VRRP (Virtual Router Redundancy Protocol) or HSRP (Hot Standby Routing Protocol) for gateway failover, ensuring redundancy.

Incorrect Options:

(B - Use IPv6 RFC2460 Addressing) IPv6 is optional in NSX, but IPv4 remains the primary addressing method.

(C - Use /16 Subnets) Using /16 subnets results in large broadcast domains and unnecessary complexity.

VMware NSX 4.x

Reference:

NSX-T Network Design Best Practices

NSX-T Gateway HA & VRRP Configuration Guide

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QUESTION: 12

A large multinational company is expanding its data center due to increased demand for online services.

The company is considering shifting from an NSX Edge VM design to a bare-metal NSX Edge design to accommodate new hardware acquisitions and maximize performance.

Which is a potential benefit for the company in shifting from an NSX Edge VM design to a bare-metal NSX Edge design?

It will maximize performance by reducing virtualization overhead.
It will allow for the implementation of more VLANs.
It will automatically distribute stateful services across Edge nodes.
It will eliminate the need for stateful services.

Answer(s): A

Explanation:

Performance Benefits of Bare-Metal NSX Edge (Correct Answer - A):

Bare-metal NSX Edge Nodes provide higher performance by eliminating the virtualization overhead associated with Edge VMs running inside ESXi/KVM hosts.

This increases throughput and reduces latency, making it ideal for high-bandwidth applications (e.g., Load Balancing, VPN, and NAT).

Incorrect Options:

(B - More VLANs):

The number of VLANs is not limited by the NSX Edge type. VLAN scalability depends on physical network design.

(C - Automatic Stateful Service Distribution):

Stateful services (NAT, FW, LB, VPN) do not auto-distribute. Stateful HA must be manually configured.

(D - Eliminates Stateful Services):

Stateful services (e.g., NAT, Load Balancer, Firewall) are still required, regardless of Edge deployment mode.

VMware NSX 4.x

Reference:

VMware NSX-T Bare-Metal Edge Deployment Guide

NSX-T Edge Node Performance Optimization

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QUESTION: 13

What are the design considerations for segment and transport zone design?

Server hardware, operating system, and application requirements
VLAN design, subnet design, and routing design
Number of virtual machines, network performance, and security requirements
Network topology, availability, and scalability requirements

Answer(s): D

Explanation:

NSX-T Segment and Transport Zone Design Considerations (Correct Answer - D):

Network topology influences how segments and transport zones are structured.

Availability ensures failover and redundancy are properly planned in transport zones.

Scalability is crucial when designing segments to accommodate growth without redesign.

Incorrect Options:

(A - Server hardware, OS, and application requirements):

These impact workload performance but are not primary factors in transport zone design.

(B - VLAN design, subnet design, and routing design):

These are part of traditional network design, but NSX-T segments use overlay networks instead.

(C - Number of VMs, network performance, and security):

While relevant, these factors alone do not define transport zone and segment architecture.

VMware NSX 4.x

Reference:

NSX-T Data Center Logical Design Best Practices

Transport Zone and Overlay Segment Design Guide

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QUESTION: 14

Which combination of stateful services are available in an NSX Gateway?

NAT, DHCP, Load Balancer
Load Balancer, Firewall, Reflexive NAT
NAT, DNS, Firewall
TLS Inspection, DHCP, DNS

Answer(s): A

Explanation:

Stateful Services in NSX Gateway (Correct Answer - A):

NSX-T Gateways (T0/T1) support the following stateful services:

NAT (Network Address Translation)

DHCP (Dynamic Host Configuration Protocol)

Load Balancing

Incorrect Options:

(B - Reflexive NAT instead of Stateful NAT):

Reflexive NAT is a stateless service, whereas stateful NAT is required for advanced networking.

(C - DNS Service on Gateway):

NSX Gateways do not provide DNS services; they rely on external DNS servers.

(D - TLS Inspection and DNS on Gateway):

TLS inspection is an IDS/IPS feature, not an NSX-T gateway service.

VMware NSX 4.x

Reference:

NSX-T Edge and Gateway Services Guide

VMware NSX-T Advanced Load Balancer Documentation

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QUESTION: 15

What is the effect of stateful services placement on NSX Edge design?

It has stateless services applications that cannot run with stateful applications.
It affects the scalability of the Edge cluster and performance of Edge nodes.
It reduces the need for load balancing in the Edge cluster.
It determines the complexity of the Edge cluster and size of Edge node.

Answer(s): B

Explanation:

Impact of Stateful Services on NSX Edge Cluster (Correct Answer - B):

Stateful services (NAT, FW, LB, VPN) require additional processing power, impacting Edge node performance.

More stateful services means higher CPU and memory utilization, affecting scalability.

Edge Cluster design must balance stateful workloads to avoid performance degradation.

Incorrect Options:

(A - Stateless services cannot run with stateful applications):

Stateful and stateless services can coexist on NSX Edge, but require careful placement.

(C - Reduces the need for load balancing):

Load balancing is still needed, even if stateful services exist.

(D - Determines complexity of Edge cluster size):

While it adds complexity, the primary impact is on performance and scalability.

VMware NSX 4.x

Reference:

NSX-T Edge Cluster Design and Performance Best Practices

VMware NSX-T Scaling Stateful Services Guide

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QUESTION: 16

A customer has two sites and is looking to deploy NSX with stretched security. The customer wants to ensure that only authorized traffic can traverse the stretched security perimeter.

What is the VMware recommended approach for implementing micro-segmentation in this scenario?

Use Distributed Firewall rules to enforce micro-segmentation across the stretched security perimeter.
Use Service Composer policies to enforce micro-segmentation across the stretched security perimeter.
Use Identity Firewall policies to enforce micro-segmentation across the stretched security perimeter.
Use Group Firewall policies to enforce micro-segmentation across the stretched security perimeter.

Answer(s): A

Explanation:

Micro-Segmentation Across Stretched Security (Correct Answer - A):

NSX Distributed Firewall (DFW) enforces security at the workload level across both sites.

DFW provides East-West traffic control, preventing unauthorized lateral movement.

Enforcement remains consistent across sites, maintaining Zero Trust Security.

Incorrect Options:

(B - Service Composer Policies):

Service Composer is deprecated in NSX-T and not used for micro-segmentation.

(C - Identity Firewalling):

Identity-Based Firewall (IDFW) applies user-based security, not network segmentation.

(D - Group Firewall Policies):

Group-based policies work with DFW, but DFW is the primary enforcement mechanism.

VMware NSX 4.x

Reference:

NSX-T Micro-Segmentation Security Best Practices

Distributed Firewall Design Guide for Stretched Security

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VMware 3V0-42.23 Exam (page: 2) VMware NSX 4.x Advanced Design Updated on: 12-Feb-2026

QUESTION: 9

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QUESTION: 10

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QUESTION: 11

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QUESTION: 12

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QUESTION: 13

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QUESTION: 14

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QUESTION: 15

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QUESTION: 16

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VMware 3V0-42.23 Exam (page: 2)
VMware NSX 4.x Advanced Design
Updated on: 12-Feb-2026