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VMware Certified
Advanced Professional
- VMware Cloud
Foundation 9.0
Networking
Version: Demo
[ Total Questions: 10]
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VMware
3V0-25.25
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A. 
B. 
C. 
D. 
Category Breakdown
Category Number of Questions
IT Architectures, Technologies, Standards 3
Plan and Design the VMware Solution 5
Install, Configure, Administrate the VMware Solution 1
VMware Products and Solutions 1
TOTAL 10
Question #:1 - [IT Architectures, Technologies, Standards]
An administrator has observed an NSX Local Manager (LM) outage at the secondary Site. However, the NSX 
Global Manager (GM) in secondary Site remains operational. What happens to data plane operations and 
policy enforcement at the secondary site?
All traffic is blocked until secondary site LM recovers.
Only local policies work; global policies cease to apply on the secondary site.
The data plane operates normally until LM recovery and reconnection.
Secondary site must failover all workloads to Primary site.
Answer: C
Explanation
Comprehensive and Detailed 250 to 350 words of Explanation From VMware Cloud Foundation (VCF) 
documents:
The architecture of within a VCF Multi-Site design is built upon a separation of theNSX Federation Control 
and the . This "decoupled" architecture ensures high availability and resiliency even when Plane Data Plane
management components become unavailable.
In NSX Federation, the handles the configuration of objects that span multiple Global Manager (GM)
locations, while the is responsible for pushing those configurations down to the local Local Manager (LM)
Transport Nodes (ESXi hosts and Edges) within its specific site. When a configuration is pushed, the Local 
Manager communicates with the and subsequently theCentral Control Plane (CCP) Local Control Plane 
on the hosts.(LCP)
If an NSX Local Manager goes offline, the "Management Plane" for that site is lost. This means no new 
segments, routers, or firewall rules can be created or modified at that site. However, the existing configuration 
is already programmed into the (the kernels of the ESXi hosts and the DPDK process of the Edge Data Plane
nodes).
According to VMware's "NSX Multi-Location Design Guide," the data plane remains fully operational during 
a Management Plane outage. Existing VMs will continue to communicate, BGP sessions on the Edges will 
remain established, and Distributed Firewall (DFW) rules will continue to be enforced based on the last 
known good configuration state cached on the hosts. The data plane does not require constant heartbeats from 
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A. 
B. 
C. 
D. 
E. 
the Local Manager to forward traffic. Therefore, operations continue normally "headless" until the LM is 
restored and can resume synchronization with the Global Manager and local hosts. Failover to a primary site 
(Option D) is only necessary if the actual data plane (hosts/storage) fails, not just the management 
components.
===========
Question #:2 - [IT Architectures, Technologies, Standards]
How should the Global Managers (GMs) and Local Managers (LMs) be distributed to ensure high availability 
and optimal performance in a multi-site NSX Federation deployment comprised of three sites? (Choose two.)
Each NSX site must have its own LM cluster that reports to the GM.
LMs are only needed on the primary site. Secondary sites can manage their local data plane directly via 
the GM.
LMs should only be deployed as single nodes to reduce overhead.
The GM cluster should be deployed across three sites.
The GM should be a single appliance placed in a central cloud environment to simplify connectivity, 
relying on vSphere HA for availability.
Answer: A D
Explanation
Comprehensive and Detailed 250 to 350 words of Explanation From VMware Cloud Foundation (VCF) 
documents:
In a Federation deployment across multiple sites, the management VMware Cloud Foundation (VCF)
architecture is designed to provide "Global Visibility" while maintaining "Local Autonomy." This is achieved 
through the coordinated distribution of and .Global Managers (GMs) Local Managers (LMs)
For a three-site deployment, best practices mandate that each site maintains its ownNSX Federation Local 
(Option A). The LM is responsible for the site-specific control plane, communicating Manager (LM) Cluster
with local Transport Nodes (ESXi and Edges) to program the data plane. If the connection to the GM is lost, 
the LM ensures the local site continues to function normally. For production environments, these must be 
clusters (typically 3 nodes) rather than single nodes to ensure local management remains available.
To protect the itself—which is the source of truth for all global networking and security Global Manager
policies—the GM cluster should be (Option D). In a standard 3-node GM stretched across the three sites
cluster, placing one node at each site ensures that the Federation management plane can survive the complete 
failure of an entire site. This "stretched" cluster configuration provides a high level of resilience and ensures 
that an administrator can still manage global policies from any surviving location.
Option B is incorrect because the GM does not communicate directly with the data plane of a site; it must go 
through an LM. Option C is a risk to availability. Option E is incorrect because vSphere HA cannot protect 
against a site-wide disaster, and a single appliance represents a significant single point of failure for the entire 
global network configuration.
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A. 
B. 
C. 
D. 
===========
Question #:3 - [Plan and Design the VMware Solution]
An administrator needs to prevent the datacenter from advertising any internal prefixes toward a new VPC, 
while still ensuring the VPC receives a default route learned from the datacenter's upstream network. Where 
should the routing policy be applied?
On each segment default gateway.
On the Tier-1 gateway.
On the VPC transit gateway.
On the provider Tier-0 neighbor.
Answer: C
Explanation
Comprehensive and Detailed 250 to 350 words of Explanation From VMware Cloud Foundation (VCF) 
documents:
In the and architecture, the is the VMware Cloud Foundation (VCF) 9.0 NSX VPC Transit Gateway (TGW)
central routing element that interconnects VPCs to each other and to the provider's infrastructure (Tier-0 or 
VRF gateways). It acts as the "Project-level" gateway that aggregates North-South traffic.
To control the visibility of routes within a specific VPC, the administrator must utilize at the Route Filtering
VPC's boundary. When a VPC is attached to a Transit Gateway, a logical interface is created. To prevent the 
data center's internal prefixes (such as management networks or other tenant subnets) from being seen by the 
VPC while still providing a path to the internet, a prefix list or route map should be applied to theVPC 
. This policy will explicitly "Deny" specific internal CIDR ranges while "Permitting" the Transit Gateway
$0.0.0.0/0$ default route advertisement from the provider.
Applying the policyat the (Option B) is technically similar but in the VPC model, the "Tier-1" Tier-1 gateway
is often an obscured or automated component of the VPC itself; the Transit Gateway is the designed 
administrative point for inter-project and North-South policy enforcement. Applying it at theprovider Tier-0 
(Option D) would be too global, affecting all VPCs or projects connected to that Tier-0, rather than neighbor
the "new VPC" specifically. Therefore, the Transit Gateway provides the necessary granular control for multi-
tenant isolation and routing optimization as per the VCF 9.0 networking model.
===========
Question #:4 - [Plan and Design the VMware Solution]
An administrator has been tasked with enabling OSPF as the routing protocol for a Tier-0 Gateway. Which 
two items must be configured to enable OSPF for a Tier-0 Gateway?
Mark two answers by clicking the two correct locations on the image. (Choose two.)
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Answer:
Explanation
To enable OSPF on a Tier-0 Gateway within a VMware Cloud Foundation (VCF) or NSX environment, an 
administrator must define the areas where the gateway will participate and the specific interfaces it will use 
for peering.
Based on the NSX Manager configuration interface, the two required items to be configured are:
Area Definition: This is necessary to define the OSPF area (e.g., Area 0) the Tier-0 gateway will 
participate in.
OSPF Configured Interfaces: OSPF must be explicitly configured on the relevant uplink interfaces to 
establish neighbor relationships and exchange routing information with physical routers.
Question #:5 - [Plan and Design the VMware Solution]
An administrator is responsible for a VMware Cloud Foundation (VCF) Private Cloud. The administrator has 
been tasked with identifying why there is no data ingress into a
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workload domain.
The workload domain has been configured with:
. A dedicated NSX Edge Cluster.
. A Tier 0 gateway.
. A Tier-1 gateway that is configured for Distributed Routing only.
. An NSX segment where a test virtual machine is located.
As part of the exercise, the administrator must map the traffic flow for data ingress into the workload domain 
to identify the steps that external network traffic will take to
ingress into the workload domain and reach the virtual machine.
Drag and drop the six steps from the Steps list on the right and place them in order in the Solution Steps. 
(Choose six.)
Answer:
Explanation
To identify why there is no data ingress into a workload domain, an administrator must understand the 
specific path external traffic takes. For a workload domain configured with a Tier-0 gateway and a Tier-1 
gateway (Distributed Routing only), the ingress traffic flow follows a hierarchical path from the physical 
network through the NSX logical components to the virtual machine.
Ingress Traffic Flow Sequence
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B. 
C. 
D. 
The correct sequence of steps for external network traffic to ingress the workload domain and reach the 
virtual machine is as follows:
Uplink for the Tier-0 Service Router (SR): Traffic enters the NSX environment from the physical 
network through the physical-to-logical interface on the Edge node.
Inter-Tier interface of the Distributed Router (DR) of the Tier-0 gateway: After being received by 
the Service Router, the packet is routed internally within the Tier-0 gateway to its distributed 
component.
Inter-tier interface of the Distributed Router (DR) on the Tier-1 gateway TEP on the Edge: The 
Tier-0 gateway routes the packet to the Tier-1 gateway. In this specific scenario, since the Tier-1 is 
"Distributed Routing only," this logical transition occurs on the Edge node participating in the transport 
zone.
TEP on the destination host: The Edge node encapsulates the packet (typically via Geneve) and 
tunnels it across the physical fabric to the specific ESXi host where the target virtual machine is 
currently residing.
Downlink interface of the Tier-1 Distributed Router (DR) to the segment to which the workload 
VM is attached: On the destination host, the packet is de-encapsulated. The local Tier-1 DR instance 
identifies the correct logical segment (VNI) for the destination IP.
NSX portgroup representing the destination segment on the destination host dvfilter and vNic of 
the workload VM: The packet is delivered to the virtual switch port, passes through any applied 
Distributed Firewall (dvfilter) rules, and finally reaches the virtual machine's network interface card 
(vNIC).
Question #:6 - [Install, Configure, Administrate the VMware Solution]
An administrator has deployed a workload domain in VMware Cloud Foundation (VCF). The workload 
domain was deployed with NSX managers using the XL form factor. After deployment, the administrator 
realizes the NSX manager is oversized and needs to change to a smaller form factor. What should the 
administrator do to accomplish this task?
Each NSX Manager must be redeployed.
Each NSX manager must be resized using the API.
Each NSX manager must be resized through vCenter.
Each NSX manager must be rightsized using VCF Operations.
Answer: A
Explanation
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A. 
B. 
C. 
D. 
Comprehensive and Detailed 250 to 350 words of Explanation From VMware Cloud Foundation (VCF) 
documents:
In , the lifecycle of the NSX Manager cluster is strictly managed byVMware Cloud Foundation (VCF)
. During the initial deployment of a Management Domain or the creation of a new Workload SDDC Manager
Domain (if using a separate NSX instance), the administrator selects a "Form Factor" (Small, Medium, Large, 
or Extra Large) based on the expected scale of the environment.
As of current VCF versions (including 5.x), the is a parameter defined during the deployment Form Factor
workflow that determines the resource reservations (CPU/RAM) and the disk partitioning of the appliance 
OVA. Unlike a standard virtual machine where you might simply adjust the vCPU and RAM settings in 
vCenter, the NSX Manager appliance is an opinionated system. Changing resources manually through 
vCenter (Option C) is not supported and can lead to stability issues or "Out of Sync" errors within SDDC 
Manager, as the database and internal services are tuned for the specific size selected at install.
There is currently no supported "in-place" upgrade or downgrade for the form factor of an existing NSX 
Manager node via the UI or API (Option B). To change the size, the administrator must the manager redeploy
nodes. In a VCF context, this often involves using SDDC Manager to delete the cluster or manually replacing 
nodes one by one—essentially deploying a new node of the correct size, joining it to the management cluster, 
syncing the data, and then removing the old, oversized node.
VCF Operations(formerly vRealize Operations) can provide "Right-sizing" (Option D), but recommendations
it cannot execute the physical resizing of an NSX Manager appliance within the VCF framework. Therefore, 
the manual or orchestrated redeployment of the nodes is the only verified method to change the appliance 
footprint.
Question #:7 - [IT Architectures, Technologies, Standards]
An administrator has noticed an issue in a freshly deployed VMware Cloud Foundation (VCF) environment 
where the BGP neighborship between the Tier-0 gateway and a physical router remains in the Idle state. Pings 
between the uplink IPs are successful. What is the issue?
Autonomous System number mismatch.
Distributed Firewall blocking traffic.
Geneve tunnel down.
Overlay MTU too low.
Answer: A
Explanation
Comprehensive and Detailed 250 to 350 words of Explanation From VMware Cloud Foundation (VCF) 
documents:
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A. 
B. 
C.D. 
E. 
F. 
In the context of , particularly versions 5.x and the architectural VMware Cloud Foundation (VCF)
advancements in , the establishment of North-South routing via the is a critical VCF 9.0 NSX Tier-0 Gateway
post-deployment or bring-up task. The Tier-0 gateway uses to peer with Border Gateway Protocol (BGP)
physical Top-of-Rack (ToR) switches to exchange reachability information for the overlay networks.
When a BGP session is reported in the state, it indicates that the BGP Finite State Machine (FSM) is at "Idle"
its first stage and is not yet attempting a TCP connection, or it has encountered an error that forced it back to 
this state. According to VMware VCF documentation and NSX troubleshooting guides, if the administrator 
can successfully ping between the Tier-0 uplink IP and the physical router interface,Layer 3 reachability is 
. This eliminates issues related to physical cabling, VLAN tagging on the trunk ports, or basic IP confirmed
interface configuration.
The primary reason a BGP session remains despite successful ICMP reachability is a configuration Idle
mismatch. Specifically, an is the most frequent culprit. BGP Autonomous System (AS) number mismatch
requires that the "Remote AS" configured on the Tier-0 gateway matches the "Local AS" of the physical peer. 
If the SDDC Manager automated workflow or the manual configuration in NSX Manager contains a typo in 
these values, the protocol handshake will fail immediately.
While a could technically block port 179, it is not common in a "freshly Distributed Firewall (DFW)
deployed" environment for the default rules to block the Edge Node's control plane traffic. andGeneve tunnels
(Option C and D) typically affect the data plane—causing packet loss for encapsulated guest VM MTU issues
traffic—but they do not prevent the BGP control plane (running over standard TCP) from moving beyond the 
Idle state. Therefore, verifying the AS numbers in the VCF Planning and Preparation Workbook against the 
physical switch configuration is the verified resolution path.
Question #:8 - [VMware Products and Solutions]
A large multinational corporation is seeking proposals for the modernization of a Private Cloud environment. 
The proposed solution must meet the following requirements:
• Support multiple data centers located in different geographic regions.
• Provide a secure and scalable solution that ensures seamless connectivity between data centers and different 
departments.
Which three NSX features or capabilities must be included in the proposed solution? (Choose three.)
NSX Edge
AVI Load Balancer
vDefend
Virtual Private Cloud (VPC)
Centralized Network Connectivity
NSX L2 Bridging
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Answer: A C D
Explanation
Comprehensive and Detailed 250 to 350 words of Explanation From VMware Cloud Foundation (VCF) 
documents:
In a modern VMware Cloud Foundation (VCF) architecture, particularly when addressing the needs of a 
multinational corporation with geographically dispersed data centers, the solution must prioritize multi-
tenancy, security, and consistent delivery. The integration of within VCF provides these core pillars.NSX
First, the is a foundational requirement for any multi-site or modern cloud environment. It serves as NSX Edge
the bridge between the virtual overlay network and the physical world. In a multi-region deployment, NSX 
Edges facilitate North-South traffic and are essential for supporting features like Global Server Load 
Balancing (GSLB) or site-to-site connectivity. Without the Edge, the software-defined data center (SDDC) 
cannot communicate with external networks or peer via BGP with physical routers.
Second, (formerly known as NSX Security) provides the advanced security framework required for a vDefend
"secure and scalable" environment. This includes Distributed Firewalling (DFW), Distributed IDS/IPS, and 
Malware Prevention. For a corporation with different departments, vDefend allows for micro-segmentation, 
ensuring that a security breach in one department's segment cannot move laterally to another. This is critical 
for meeting compliance and isolation requirements across global regions.
Third, the model is the cornerstone of the latest VCF 9.0 and 5.x architectures. Virtual Private Cloud (VPC)
It enables the "scalable solution" for different departments by providing a self-service consumption model. 
Each department can manage its own isolated network space, including subnets and security policies, without 
needing deep networking expertise or constant tickets for the central IT team. This abstraction simplifies 
management across multiple data centers and allows for consistent application of policies regardless of the 
physical location.
While AVI Load Balancer and Centralized Network Connectivity are valuable, they are often considered add-
ons or outcomes rather than the core architectural features that define the multi-tenant, secure, and 
geographically distributed nature of a modern VCF private cloud modernization project.
===========
Question #:9 - [Plan and Design the VMware Solution]
An administrator is responsible for managing a VMware Cloud Foundation (VCF) Private Cloud consisting of 
a single VCF Fleet with a single Workload Domain.
The administrator has been tasked with configuring NSX to support the new Virtual Desktop Infrastructure 
(VDI) solution that allows users to securely access a mainframe-
based application located on the physical network. The VDI solution will use a dedicate DHCP solution for 
each of the the desktop pool segments and static addresses for all
VDI management components.
The administrator completes the following steps towards configuring DHCP:
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1. Creates a new tier-1 gateway (vdi-tier-1) and links it to the tier-0 gateway (gw-tier-0).
2. Creates one new segment for vdi management (vdi-seg-01) and connects it to vdi-tier-1.
3. Creates two new segments for virtual desktops (vdi-seg-02 and vdi-seg-03) and connects them to vdi-tier-1.
Drag and drop the six steps from the list of Possible Steps on the left and place them in order in to the 
Solution Steps. (Choose six.)
Answer:
Explanation
For the VDI solution requiring dedicated DHCP for desktop pool segments and static addresses for 
management components, the correct sequence of steps to configure DHCP is as follows:
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A. 
B. 
C. 
D. 
Set the DHCP Config on vdi-tier-1 to DHCP Server and attach a new DHCP Server Profile with 
an IPv4 DHCP Server Address.This establishes the Tier-1 gateway as the local DHCP service 
provider for its attached segments.
On vdi-seg-02, in the DHCP Config set the DHCP Type to Gateway DHCP Server.This instructs 
the segment to use the DHCP server service configured on its parent Tier-1 gateway.
On vdi-seg-02, in the DHCP Config set the DHCP Range and DNS Servers.Defines the specific IP 
pool and network settings for the first desktop pool.
On vdi-seg-03, in the DHCP Config set the DHCP Type to Gateway DHCP Server.Instructs the 
second desktop segment to also leverage the Tier-1 DHCP service.
On vdi-seg-03, in the DHCP Config set the DHCP Range and DNS Servers.Defines the IP pool for 
the second desktop pool.
On vdi-seg-01, in the DHCP Config set the DHCP Type to DHCP Relay.Since management 
components use static addresses provided by an external mainframe-based solution or dedicated 
physical infrastructure, a relay is used rather than a local server to ensure proper network isolation and 
policy enforcement for the physical mainframe application.
Question #:10 - [Plan and Design the VMware Solution]
When using a DHCP Relay on a segment, which design restriction must be considered?
DHCP settings, DHCP options, and static bindings cannot be configured on the segment.
DHCP client requests cannot be relayed to the external DHCPservers.
DHCP settings, DHCP options, and static bindings can be configured on the segment.
DHCP Relay service is available to all the other segments in the network.
Answer: A
Explanation
Comprehensive and Detailed 250 to 350 words of Explanation From VMware Cloud Foundation (VCF) 
documents:
In networking, IP address management within an NSX segment can be VMware Cloud Foundation (VCF)
handled by either the native NSX DHCP server or by an external DHCP server. When an administrator 
chooses to use an existing external corporate DHCP infrastructure, they must configure a on the DHCP Relay
logical segment.
The DHCP Relay works by intercepting the initial DHCP Discover broadcast from a workload VM and 
forwarding it (as a unicast packet) to the specified IP address of the external DHCP server. However, NSX 
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enforces a strict mutual exclusivity in its configuration logic to prevent conflicts and unpredictable address 
assignments.
According to the "NSX-T Data Center Administration Guide," once a segment is configured to use aDHCP 
, the native NSX DHCP capabilities for that specific segment are disabled. This means thatRelay profile
(Option A). All DHCP settings, DHCP options, and static bindings cannot be configured on that segment
such configurations, including IP reservations and scope options (like DNS or NTP), must be managed 
centrally on the external DHCP server.
Option C is incorrect because the UI will physically grey out or prevent the entry of native DHCP parameters 
once the Relay is selected. Option B is incorrect as the primary purpose of a Relay is precisely to forward 
requests to external servers. Option D is incorrect because a DHCP Relay is configured on a per-segment or 
per-gateway basis; it is not a "global" service that automatically covers all other segments in the network. 
Therefore, the architectural trade-off when choosing a Relay is the shift of all management and binding logic 
to the external physical or virtual DHCP appliance.
===========
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