Advanced VMware Cloud Foundation 9.0 Networking (3V0-25.25) Free Practice Test

Question 1

An administrator is configuring NSX resource sharing to allow shared access to multiple resources in the default space.
By default, which user role owns the shared resources for the default space?

A. Project Admin

B. Enterprise Admin

C. Security Admin

D. Network Admin

Correct Answer: B

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Question 2

The administrator is working to ascertain the encapsulation of GENEVE by reviewing the capture on Wireshark.
The administrator instructed VM-1 to send a continuous ICMP request directed at VM-2.
Click to highlight where the administrator should observe the GENEVE encapsulated packet.

Correct Answer:

Explanation:
The administrator should click thevmnic0interface on theESX-1 Host.
In aVMware Cloud Foundation (VCF)environment, theGENEVE (Generic Network Virtualization Encapsulation)protocol is the industry-standard tunnel format used by NSX to create an overlay network.
This protocol allows Layer 2 traffic from virtual machines to be "tunneled" over a Layer 3 physical IP fabric, enabling workloads to communicate as if they were on the same segment even when separated by physical routers.
When VM-1 on ESX-1 sends an ICMP request to VM-2 on ESX-2, the packet starts as a standard Ethernet frame at the virtual machine'svnic1. At this stage, the packet contains no encapsulation. As the frame enters theVirtual Distributed Switch (VDS)and hits theTunnel End Point (TEP), the host's kernel performs the encapsulation process. The TEP adds a GENEVE header, a UDP header (port 6081), and an outer IP header.
Thevmnic0(physical NIC) on the source host (ESX-1) is the specific "egress" point where this transformation is complete. A packet capture taken at this physical interface will show the "Outer IP" address of the source TEP and destination TEP, with the original ICMP packet hidden inside the GENEVE payload. If the administrator were to click on the VM's vnic, they would only see standard ICMP. By selecting thevmnic0, the administrator captures the traffic as it is placed onto the physical wire, which is the verified location to troubleshoot MTU issues, encapsulation errors, or physical fabric connectivity in a VCF environment.

Question 3

An administrator implements route leaking between the Tier-0 gateways to enhance east/west communication because the physical L3 devices are oversubscribed.
Where should route-maps be configured based on the architecture observed in the diagram?

Correct Answer:

Explanation:
The administrator should click on theblue box representing the logical link between the two Tier-0 Gateways.
In the multi-tenant architecture ofVMware Cloud Foundation (VCF) 9.0, networking is structured hierarchically with VPC Gateways, Transit Gateways, and Tier-0 Gateways. Under normal conditions, traffic between isolated divisions (such as Division A and Division B) that need to communicate might be routed
"North" all the way to thePhysical L3 Devices(the physical core routers) before being routed back down.
However, if these physical devices are oversubscribed or reaching their throughput limits, this creates a performance bottleneck.
To optimize this flow, NSX allows forRoute Leakingat the Tier-0 layer. By establishing a logical peering or connection directly between twoTier-0 Gatewayswithin the virtual fabric, administrators can exchange routing information (prefixes) between the two environments without the traffic ever leaving the SDDC.
To control exactly which networks are shared and to prevent routing loops or unauthorized access,Route- Mapsmust be applied at this inter-gateway connection point. These route-maps define the "Permit" or "Deny" statements for specific IP prefixes being "leaked" from one routing table to another. By clicking the highlighted link between the Tier-0 Gateways, the administrator is targeting the specific control plane interface where these prefix exchanges occur. This configuration ensures that East-West traffic between Division A and Division B is handled locally by theNSX Edge Nodes, effectively bypassing the oversubscribed physical L3 devices and significantly reducing latency and physical network congestion.

Question 4

An administrator must provide North/South connectivity for a VPC. The fabric exposes a distributed external VLAN across all ESX hosts. But, the only BGP peer to the core is on a VLAN only accessible on the Edge Cluster. Which design is required?

A. Use a VPC Tier-0 Gateway in active/active mode with distributed eBGP peering.

B. Centralized Transit Gateway on the Edge Cluster.

C. Distributed Transit Gateway with an EVPN route reflector on the transport nodes.

D. Deploy a Provider Tier-1 with BGP and connect the VPC Transit Gateway via route leaking.

Correct Answer: B

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Question 5

An administrator is configuring Border Gateway Protocol (BGP) routing on a Tier-0 Gateway to optimize north-south traffic flow between the NSX environment and multiple upstream physical routers. The environment includes two external connections that advertise overlapping routes to the same destination networks. To ensure predictable and efficient routing behavior, the administrator decides to manipulate specific BGP attributes on outbound advertisements and inbound route updates. What are two valid BGP Attributes that can be used to influence the route path traffic will take? (Choose two.)

A. AS-Path Prepend

B. MED

C. BFD

D. Cost

Correct Answer: A,B

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Question 6

Which two statements describe the recommended strategy for configuring and synchronizing security policies across Federated NSX sites? (Choose two.)

A. Security policies should be defined locally on each LM and only synchronized manually by an administrator to prevent accidental conflicts.

B. The Global Manager only synchronizes networking (L2/L3) configurations. Security rules must be configured separately on each site.

C. Local Managers (LMs) can define local policies, but any global policies defined on the GM always take precedence over the local ones.

D. Consistency is achieved by ensuring all security groups have the exact same name on every Federated site's Local Manager (LM).

E. Security policies, such as Distributed Firewall rules and security groups, must be defined as global policies on the Global Manager (GM).

Correct Answer: C,E

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Question 7

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?

A. Overlay MTU too low.

B. Distributed Firewall blocking traffic.

C. Geneve tunnel down.

D. Autonomous System number mismatch.

Correct Answer: D

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VMware Advanced VMware Cloud Foundation 9.0 Networking (3V0-25.25) Free Practice Test