VMware 3V0-42.20 Exam Dumps & Practice Test Questions

Question 1: 

Which comprehensive family of design solutions provides blueprints for a customer's Software-Defined Data Center (SDDC) implementations, encompassing compute, storage, networking, and management?

A. VMware SDDC Design 

B. VMware Validated Design 

C. VMware POC Design 

D. VMware Cloud Foundation

Answer: B. VMware Validated Design

Explanation:

VMware Validated Design stands as the definitive answer because it precisely describes a structured and tested approach to building a Software-Defined Data Center (SDDC). Unlike a conceptual "SDDC Design" (A) which is more of an overarching idea, or a "Proof of Concept (POC) Design" (C) which is limited to testing, VMware Validated Design offers comprehensive, pre-engineered blueprints. These blueprints meticulously cover all essential aspects of a data center: compute resources, storage solutions, network infrastructure, and management tools. 

This holistic approach ensures that all components are not only compatible but also seamlessly integrated, leading to a robust and reliable SDDC deployment. While VMware Cloud Foundation (D) is a powerful product that integrates these components, it's a platform itself, not a design framework or set of validated blueprints. VMware Validated Design, therefore, serves as the authoritative guide for implementing such a platform, providing proven designs and best practices for a fully functional SDDC.

Question 2: 

In an NSX-T Data Center design, identify three supported IPv6 features.

A. IPv6 OSPF 

B. IPv6 static routing 

C. IPv6 switch security 

D. IPv6 DNS 

E. IPv6 Distributed Firewall 

F. IPv6 VXLAN

Answer: B. IPv6 static routing, E. IPv6 Distributed Firewall, F. IPv6 VXLAN

Explanation:

NSX-T Data Center offers robust support for IPv6 within its networking and security functionalities. Among the given options, IPv6 static routing (B) is fully supported, allowing administrators to define fixed pathways for IPv6 traffic within the NSX-T environment. This provides direct control over how IPv6 packets traverse the network. The IPv6 Distributed Firewall (E) is another key supported feature. NSX-T's Distributed Firewall provides granular security policies and micro-segmentation capabilities that extend to both IPv4 and IPv6 traffic, enabling consistent security across the data center. 

Finally, IPv6 VXLAN (F) is also supported, enabling the creation of Layer 2 network overlays using VXLAN tunnels for IPv6 traffic. This allows for flexible and scalable network segmentation for IPv6-enabled workloads.

It's important to note why the other options are not directly supported or are less relevant in this context. While OSPF is a routing protocol, specific OSPFv3 support for IPv6 within NSX-T is not as prevalent as its IPv4 counterpart, making IPv6 OSPF (A) generally unsupported in the direct manner implied. 

IPv6 switch security (C) is a broad term; while NSX-T offers various security features, there isn't a distinct "IPv6 switch security" feature separate from the comprehensive Distributed Firewall. IPv6 DNS (D) is typically a service managed at the application or operating system level, not a core networking or security feature directly managed by NSX-T itself.

Question 3: 

An architect is designing the physical infrastructure for an NSX-T Data Center solution. The organization has the following requirements: workloads need to move to a Cloud Provider, network VLANs or VNIs must extend across sites on the same broadcast domain, VM mobility (migration and disaster recovery) is needed without IP address changes, and 1500-byte MTU must be supported between sites. 

Which solution should the architect include in the design?

A. Load Balancer 

B. Reflexive NAT 

C. SSL VPN 

D. L2 VPN

Answer: D. L2 VPN

Explanation:

The core requirements in this scenario revolve around seamlessly extending network segments and enabling workload mobility across different sites, all while maintaining IP addresses and supporting a specific MTU size. L2 VPN (Layer 2 VPN) (D) is the ideal solution to address these needs. An L2 VPN allows for the extension of Layer 2 networks (like VLANs or VNIs) over a Layer 3 network. 

This creates a stretched Layer 2 broadcast domain between sites, which is precisely what's needed to facilitate VM migration and disaster recovery without requiring any IP address changes for the virtual machines. Furthermore, L2 VPNs are capable of supporting the specified 1500-byte MTU, ensuring proper packet transmission.

Let's consider why the other options are not suitable. A Load Balancer (A) is used for distributing incoming network traffic across multiple servers to optimize resource utilization and maximize throughput; it does not address network extension or VM mobility across sites. 

Reflexive NAT (B) is a Network Address Translation technique primarily used for inbound connections to devices that initiate outbound connections and is irrelevant to the stated requirements of network extension and VM mobility. An SSL VPN (C) provides secure remote access for individual users to a network, but it is not designed for extending entire Layer 2 networks between data centers or enabling large-scale VM mobility without IP re-addressing.

Question 4: 

An architect is assisting with the physical design of an NSX-T Data Center solution. The organization has six hosts with two 10Gb NICs each, connected to a pair of switches. 

They plan a collapsed Management/Edge/Compute cluster and demand no single point of failure. Which virtual switch design should the architect recommend?

A. Create a vSphere Distributed Switch (vDS) for Management VMkernel traffic and assign one NIC. Also, create an NSX-T Virtual Distributed Switch (N-VDS) for overlay traffic and assign one NIC. 

B. Create an NSX-T Virtual Distributed Switch (N-VDS) for Management VMkernel traffic and assign one NIC. Also, create an NSX-T Virtual Distributed Switch (N-VDS) for overlay traffic and assign one NIC. 

C. Create an NSX-T Virtual Distributed Switch (N-VDS) for Management VMkernel and overlay traffic and assign both NICs. 

D. Create an NSX-T Virtual Distributed Switch (N-VDS) for Management VMkernel and overlay traffic and assign a new virtual NIC.

Answer: C. Create an NSX-T Virtual Distributed Switch (N-VDS) for Management VMkernel and overlay traffic and assign both NICs.

Explanation:

The crucial requirements in this scenario are the "collapsed Management/Edge/Compute cluster" and the absolute necessity of "no single point of failure." Given that each host has two 10Gb NICs, the design must maximize redundancy and efficiency.

Option C is the optimal choice because it consolidates both Management VMkernel and NSX-T overlay traffic onto a single NSX-T Virtual Distributed Switch (N-VDS) and assigns both physical NICs to it. This approach ensures high availability and eliminates a single point of failure for all critical network traffic (management and data plane) on the host. By utilizing both NICs, the N-VDS can leverage capabilities like teaming and failover, providing continuous connectivity even if one physical NIC experiences an issue.

Let's analyze why other options fall short: Options A and B both propose assigning only one NIC to each traffic type (management and overlay), which inherently introduces a single point of failure. If the single assigned NIC fails, that traffic path will be disrupted, violating the core requirement. Option D is ambiguous with "assign a new virtual NIC" and doesn't explicitly guarantee the use of both physical NICs for redundancy, making it an inferior choice for ensuring no single point of failure. Therefore, to achieve the desired high availability and efficient use of available hardware in a collapsed cluster, dedicating both physical NICs to a unified N-VDS for all traffic types is the superior design.

Question 5: 

What is the key design benefit achieved by deploying a dedicated Edge Cluster using either Virtual Machines or Bare Metal?

A. reduced administrative overhead 

B. predictable network performance 

C. multiple Tier-0 gateways per Edge Node Cluster 

D. support for Edge Node Clusters with more than 10 Edge Nodes

Answer: B. predictable network performance

Explanation:

The primary and most significant design benefit of deploying a dedicated Edge Cluster VM or Bare Metal (B) is the predictable network performance it offers. When Edge nodes are dedicated, whether as virtual machines on dedicated hosts or as bare metal appliances, their resources (CPU, memory, and network I/O) are exclusively allocated to handling network services like routing, NAT, load balancing, and VPN. This isolation prevents resource contention with other workloads in the data center. 

In contrast, if Edge services were co-located with general compute workloads, their performance could fluctuate due to resource demands from other applications, leading to unpredictable network behavior. Predictable network performance is crucial for maintaining consistent service levels and ensuring the reliability of critical network functions.

While other options might offer some ancillary benefits, they are not the key design driver for a dedicated Edge cluster. Reduced administrative overhead (A) might be a side effect in some specific configurations but is not the main reason for dedication. Multiple Tier-0 gateways per Edge Node Cluster (C) is a feature of NSX-T Edge, but it's not the primary benefit derived from the dedication of the cluster itself; rather, it's a capability that leverages a dedicated Edge cluster. 

Similarly, support for Edge Node Clusters with more than 10 Edge Nodes (D) relates to scalability, which a dedicated cluster can facilitate, but the fundamental benefit of dedication is performance isolation and predictability.

Question 6: 

An architect is creating a logical design for an NSX-T Data Center solution. The assessment revealed a performance-based SLA for East-West traffic, a need to prioritize business-critical application traffic, and high bandwidth demands from a file share service. 

Which design element should the architect incorporate?

A. Review average North/South traffic from the core switches and firewall. 

B. Include a segment QoS profile and review the impact of utilizing this feature. 

C. Meet with the organization’s application team to get additional information. 

D. Monitor East-West traffic throughout normal business cycles.

Answer: B. Include a segment QoS profile and review the impact of utilizing this feature.

Explanation:

The core problem presented is the need to manage and prioritize East-West traffic based on performance SLAs and business criticality, specifically addressing high bandwidth demands from a file share. The most direct and effective solution for this is implementing Quality of Service (QoS) mechanisms.

Therefore, B. Include a segment QoS profile and review the impact of utilizing this feature is the correct action. NSX-T's segment QoS profiles allow the architect to define policies that classify, mark, and prioritize specific types of traffic (e.g., business-critical application traffic, file share traffic). This ensures that critical applications receive guaranteed bandwidth and lower latency, preventing high-bandwidth consumers from monopolizing network resources and impacting other services. Reviewing the impact is essential to validate that the QoS policies achieve the desired prioritization without inadvertently hindering other necessary traffic.

Let's consider why the other options are less appropriate: A. Review average North/South traffic from the core switches and firewall: This focuses on North-South traffic (traffic entering/exiting the data center), which is not the primary concern here; the question specifically highlights East-West traffic (traffic within the data center). C. Meet with the organization’s application team to get additional information: While gathering information is always valuable, the assessment phase has already provided the critical details (SLA, prioritization needs, high-demand service). The immediate need is a design solution, not further discovery. D. Monitor East-West traffic throughout normal business cycles: Monitoring is a crucial ongoing activity for performance management, but it's a reactive measure, not a proactive design element to solve the prioritization problem itself. The design needs to implement a solution for prioritization, which QoS provides.

Question 7: 

Which NSX-T feature is used to allocate network bandwidth to business-critical applications and address situations where various types of traffic contend for shared resources?

A. Network I/O Control Profiles 

B. LLDP Profile 

C. LAG Uplink Profile 

D. Transport Node Profiles

Answer: A. Network I/O Control Profiles

Explanation:

The question directly asks for an NSX-T feature that enables the allocation of network bandwidth and resolves resource contention among different traffic types, especially for business-critical applications. The feature explicitly designed for this purpose in NSX-T is A. Network I/O Control Profiles.

Network I/O Control Profiles provide a mechanism to manage and prioritize network bandwidth within the NSX-T environment. This feature allows administrators to define rules that classify different types of traffic (e.g., vMotion, IP storage, virtual machine traffic, management traffic) and assign shares, limits, and reservations to them. 

By doing so, Network I/O Control ensures that business-critical applications receive their necessary bandwidth even during periods of network congestion, preventing less critical traffic from monopolizing resources and ensuring consistent performance.

Let's briefly look at why the other options are incorrect: B. LLDP Profile (Link Layer Discovery Protocol): LLDP is a protocol used for discovering network devices on a local area network. It's for network topology and device information, not for bandwidth allocation or traffic prioritization. C. LAG Uplink Profile (Link Aggregation Group): LAG uplink profiles are used to bundle multiple physical network links into a single logical link, providing increased bandwidth and redundancy. 

While it increases overall capacity, it doesn't granularly allocate bandwidth to different types of traffic competing for resources on that link. D. Transport Node Profiles: Transport Node Profiles define the configuration of transport nodes (e.g., ESXi hosts that participate in the NSX-T overlay network). They encompass settings for host preparation, network connectivity, and other infrastructure-level configurations, but they do not directly manage bandwidth allocation for specific application traffic.

Question 8: 

An architect is designing the logical layer of an NSX-T Data Center solution. The organization has a single 10-host vSphere cluster, wants improved network security and automation, cannot change the existing vSphere deployment due to current utilization and policies, and requires high availability. 

Which three design elements should the architect include?

A. Apply vSphere DRS VM-Host anti-affinity rules to the virtual machines of the NSX-T Edge cluster. 

B. Deploy at least two NSX-T Edge virtual machines in the vSphere cluster. 

C. Deploy the NSX Controllers in the management cluster. 

D. Apply vSphere Distributed Resource Scheduler (vSphere DRS) VM-Host anti-affinity rules to NSX Managers. 

E. Remove 2 hosts from the cluster and create a new edge cluster. 

F. Remove vSphere DRS VM-Host affinity rules to the NSX-T Controller VMs.

Answer: B. Deploy at least two NSX-T Edge virtual machines in the vSphere cluster, C. Deploy the NSX Controllers in the management cluster, D. Apply vSphere Distributed Resource Scheduler (vSphere DRS) VM-Host anti-affinity rules to NSX Managers.

Explanation:

Given the customer's requirements for high availability within an existing 10-host vSphere cluster and the need for improved network security and automation, the architect should focus on distributing key NSX-T components for resilience and isolating management functions.

1. B. Deploy at least two NSX-T Edge virtual machines in the vSphere cluster: This is crucial for high availability of NSX-T's data plane services (routing, load balancing, VPN). By deploying multiple Edge VMs, redundancy is ensured, preventing a single point of failure for North-South traffic and other Edge-related functions.

2. C. Deploy the NSX Controllers in the management cluster: This is a best practice for architectural separation and security. The NSX Managers (and by extension, the internal controllers that form the management plane) should ideally reside in a dedicated management cluster. This isolates the critical control plane from workload-related issues in the data plane cluster, enhancing stability, security, and manageability, aligning with the customer's goal of improved security and automation.

3. D. Apply vSphere Distributed Resource Scheduler (vSphere DRS) VM-Host anti-affinity rules to NSX Managers: To further bolster the high availability of the NSX-T management plane, applying anti-affinity rules to the NSX Manager VMs is essential. This ensures that the multiple NSX Manager instances do not reside on the same physical host. If a host fails, only one NSX Manager instance is affected, allowing the others to continue operating and maintaining the management plane's availability.

Let's evaluate the incorrect options: A. Apply vSphere DRS VM-Host anti-affinity rules to the virtual machines of the NSX-T Edge cluster: While anti-affinity for Edge VMs is a good practice, deploying at least two Edge VMs (Option B) provides the fundamental redundancy. The anti-affinity rules refine this by ensuring they are on different hosts, but it's secondary to the deployment of multiple instances. E. Remove 2 hosts from the cluster and create a new edge cluster: The customer explicitly states "Current cluster utilization and business policies prevent changing the existing vSphere deployment." This option directly contradicts that constraint. F. Remove vSphere DRS VM-Host affinity rules to the NSX-T Controller VMs: NSX-T Controller functionality is now integrated into the NSX Manager appliance. Removing affinity rules without applying anti-affinity rules could lead to poor distribution and reduced high availability. The focus should be on ensuring distribution (anti-affinity), not simply removing existing rules.

Question 9: 

An architect is developing a conceptual design for an NSX-T Data Center solution, having gathered the following information: applications utilize IPv6 addressing, network administrators lack NSX-T familiarity, hosts have only two physical NICs, an existing management cluster is available for NSX-T components, dynamic routing is required between physical and virtual networks, and a storage array is available for NSX-T components. 

Which piece of information represents a constraint documented by the architect?

A. Dynamic routing should be configured between the physical and virtual network. 

B. There are applications which use IPv6 addressing. 

C. Hosts can only be configured with two physical NICs. 

D. There are enough CPU and memory resources in the existing management cluster.

Answer: C. Hosts can only be configured with two physical NICs.

Explanation:

In the context of a conceptual design, a constraint is a limitation or restriction that directly impacts the design choices and how the solution can be implemented. It's something that the architect must work within or around.

C. Hosts can only be configured with two physical NICs is a clear constraint. This physical limitation directly dictates how network redundancy, bandwidth allocation, and segregation of traffic types (e.g., management, vMotion, overlay, uplink) can be achieved on each host. With only two NICs, the design must carefully consider how to balance these different traffic flows while maintaining high availability, potentially requiring trade-offs or specific configurations that might not be necessary with more NICs. This restriction fundamentally limits the physical network design options for the NSX-T deployment.

Let's examine why the other options are not constraints: A. Dynamic routing should be configured between the physical and virtual network: This is a requirement or a design goal. It specifies a desired functionality for the solution, not a limitation on its implementation. B. There are applications which use IPv6 addressing: This is also a requirement or a functional specification. It indicates that the NSX-T design must support IPv6, but it doesn't inherently limit the physical or logical design choices in the same way a hardware restriction does. D. There are enough CPU and memory resources in the existing management cluster: This is a resource availability statement, indicating that a necessary resource is present. If it stated there were insufficient resources, then it would be a constraint. As stated, it's a favorable condition, not a limitation.

Question 10: 

Which two benefits can be achieved by using in-band management for an NSX Bare Metal Edge Node? (Choose two.)

A. Reduces storage requirements. 

B. Reduces cost.

C. Preserves packet locality. 

D. Reduces egress data.

E. Preserves switchports.

Answer: C. Preserves packet locality, E. Preserves switchports.

Explanation:

In-band management for an NSX Bare Metal Edge Node implies that the management traffic (for accessing and configuring the Edge Node) flows over the same physical network interfaces and logical paths as the data traffic it processes. This approach offers distinct advantages:

1. C. Preserves packet locality: When management traffic shares the same network path as data traffic, there's no need for management packets to be routed separately through different interfaces or network segments. This keeps the management and data planes logically close, which can contribute to lower latency and more efficient communication, thus "preserving packet locality."

2. E. Preserves switchports: With in-band management, you do not need to dedicate additional physical network interfaces on the Bare Metal Edge Node, nor additional switchports on the physical network switches, solely for management purposes. The existing data interfaces are utilized for both functions, which directly "preserves switchports" and can simplify the physical cabling and network design.

Let's explain why the other options are generally incorrect: A. Reduces storage requirements: In-band management is a networking concept and has no direct impact on the storage requirements of the Bare Metal Edge Node or the data it processes. B. Reduces cost: While preserving switchports (E) might indirectly contribute to some cost savings by reducing the need for additional hardware, "reduces cost" is a very broad statement and not a primary or direct benefit of in-band management itself. The core benefits are operational and architectural, related to network efficiency and simplicity. D. Reduces egress data: In-band management does not inherently reduce the amount of data leaving (egress) the network. It only defines how management traffic is routed in relation to data traffic. The overall volume of egress data depends on application and user activity, not the management method.