VMware 3V0-42.20 Exam Questions Instant Access

Question 1

Which NSX-T feature is used to allocate the network bandwidth to business-critical applications and to resolve situations where several types of traffic compete for common resources? (Choose the best answer.)

ANetwork I/O Control Profiles

BLLDP Profile

CLAG Uplink Profile

DTransport Node Profiles

Answer : A

Use the Network I/O Control (NIOC) profile to allocate the network bandwidth to business-critical applications and to resolve situations where several types of traffic compete for common resources.

NIOC profile introduces a mechanism to reserve bandwidth for the system traffic based on the capacity of the physical adapters on a host. Version 3 of the Network I/O Control feature offers improved network resource reservation and allocation across the entire switch.

Network I/O Control version 3 for NSX-T Data Center supports the resource management of the system traffic related to virtual machines and to infrastructure services, such as vSphere Fault Tolerance. System traffic is strictly associated with an ESXi host.

Taken from https://docs.vmware.com/en/VMware-NSX-T-Data-Center/3.0/installation/GUID-9A8FD62A-F099-4329-8220-6D5853F9A62D.html

Question 2

An NSX-T architect is working with a customer who wants to improve performance and future-proof their workloads with a multi-site architecture.

A current-state analysis captured this information:

Latency between sites is 160ms.

Bandwidth is 2Gbps.

The MTU is 1600.

What two VMware design recommendations should the architect recommend to the organization to achieve future-proofing? (Choose two.)

AMTU is recommended to be 9000.

BMTU must be at least 1700.

CBandwidth must be at least 10Gbps.

DLatency RTT is acceptable.

ELatency must be less than 150ms.

Answer : A, E

As per VMware documentation: https://docs.vmware.com/en/VMware-NSX-T-Data-Center/3.0/administration/GUID-5D7E3D43-6497-4273-99C1-77613C36AD75.html

Requirements for Multisite Deployments

The bandwidth must be at least 1 Gbps and the latency (RTT) must be less than 150 ms.

MTU must be at least 1600. 9000 is recommended.

Requirements for Multisite Deployments

Inter-site Communication

- The bandwidth must be at least 1 Gbps and the latency (RTT) must be less than 150 ms.

- MTU must be at least 1600. 9000 is recommended.

NSX Manager Configuration

- Automatic backup when NSX-T Data Center configuration changes must be enabled.

- NSX Manager must be set up to use FQDN.

Data Plane Recovery

- The same internet provider must be used if public IP addresses are exposed through services such as NAT or load balancer.

- The HA mode for the tier-0 gateway must be active-standby, and the failover mode must be preemptive.

Cloud Management System

- The cloud management system (CMS) must support an NSX-T Data Center plug-in. In this release, VMware Integrated OpenStack (VIO) and vRealize Automation (vRA) satisfy this requirement.

https://docs.vmware.com/en/VMware-NSX-T-Data-Center/3.0/administration/GUID-5D7E3D43-6497-4273-99C1-77613C36AD75.html

Question 3

A customer wants to use ECMP to provide additional throughput and availability for their critical business applications. Some applications require load balancing for scale and availability.

Which two Edge design choices can an architect present to the customer? (Choose two.)

ACreate a Tier-0 gateway in Active/Standby mode and a Tier-1 gateway in Active/Standby mode.

BConfigure ECMP and Load Balancing on the Tier-0 gateway.

CCreate a Tier-0 gateway in Active/Active mode and a Tier-1 gateway in Active/Standby mode.

DCreate a Tier-0 gateway in Active/Standby mode.

EConfigure ECMP on the Tier-0 gateway and Load Balancing on the Tier-1 gateway.

Answer : C, E

https://vxplanet.com/2019/07/27/nsx-t-tier0-ecmp-routing-explained/

Question 4

An architect is helping an organization with the Physical Design of an NSX-T Data Center solution.

This information was gathered during a workshop:

Migrating existing data center to KVM hosts.

Redundancy and high availability are required.

No component can be a single point of failure.

Which selection should the architect recommend? (Choose the best answer.)

ALinux Bridge redundancy with Active/Active Mode and multiple pNICs with necessary binding

BLinux Bridge redundancy with Active/Active Mode and single pNIC with static binding

CvSS/vDS in Active/Standby Mode with necessary binding

DvSS/vDS in Active/Active Mode with necessary pNICS and required binding modes

Answer : A

Question 5

An architect is helping an organization with the Logical Design of an NSX-T Data Center solution. During discussions about centralized services NAT running on Tier-1 or Tier-0 Gateway, the customer made these requests:

Services contain stateful services.

Services should be in high availability mode.

Which two selections should the architect include in their design? (Choose two.)

AAn active/active model should be used.

BUse Reflexive NAT on the uplink interface.

CDNAT should be applied on the uplink interface.

DMix stateful and stateless NAT rules on the same gateway.

EThe high availability mode supported is only Active-Standby.

Answer : C, E

Stateful services: Require HA mode configured as Active-Standby

Stateless services: Require HA mode configured as Active-Active

You can create different NAT rules:

* Source NAT (SNAT) translates the source IP of the outbound packets to a known public IP address so that the application can communicate with the outside world without using its private IP address. SNAT also tracks the reply.

* Destination NAT (DNAT) enables access to internal private IP addresses from the outside world by translating the destination IP address when inbound communication is initiated. DNAT also takes care of the reply. For both SNAT and DNAT, users can apply NAT rules based on the 5-tuple match criteria.

* Reflexive NAT rules are stateless access control lists (ACLs) that must be defined in both directions. These rules do not track the connection. Reflexive NAT rules are applied when stateful NAT cannot be used. For example, when a Tier-0 gateway is running in active-active equal-cost multipath (ECMP) mode, you cannot configure stateful NAT because asymmetrical paths might cause issues.

Question 6

An architect is helping an organization with the Physical Design of an NSX-T Data Center solution. This information was gathered during a workshop about ESXi Host networking:

A total of 50 ESXi hosts to be configured as Transport Nodes.

All ESXi hosts have a dedicated 2 Intel 10Gbps Physical Network adapter for the Overlay Traffic.

To achieve low latency, high throughput, redundancy, and performance, which two NIC teaming policies should the architect recommend? (Choose two.)

ALoad Balance Source MAC

BLoad Balance Port ID

CLoad Balance Source

DLoad Balance Source Port ID

EFailover Order

Answer : A, C

Uplink profiles within NSX-T shows that you can only use Load balance Source and Load balance Source MAC, failover order doesnt provide any load balancing or high throughput https://docs.vmware.com/en/VMware-NSX-T-Data-Center/3.1/installation/GUID-50FDFDFB-F660-4269-9503-39AE2BBA95B4.html

https://docs.vmware.com/en/VMware-NSX-T-Data-Center/3.2/installation/GUID-50FDFDFB-F660-4269-9503-39AE2BBA95B4.html

Failover Order: Select an active uplink is specified along with an optional list of standby uplinks. If the active uplink fails, the next uplink in the standby list replaces the active uplink. No actual load balancing is performed with this option. Load Balance Source: Select a list of active uplinks. When you configure a transport node, you can pin each interface of the transport node to one active uplink. This configuration allows use of several active uplinks at the same time. Load Balance Source MAC Address: Select an uplink based on a hash of the source Ethernet.

Question 7

An architect is helping an organization with the Conceptual Design of an NSX-T Data Center solution.

Which risk is documented by an architect? (Choose the best answer.)

AThe security team has a firewall communication matrix documented.

BThe team is not trained for NSX-T but have a very strong experience with vSphere.

COpen communication between different application tiers is not allowed.

DAggregate N-S throughput at any given time should be at least 10G.

Answer : B

VMware Advanced Design VMware NSX-T Data Center 3V0-42.20 Exam Questions