Free 3V0-25.25 Questions for VMware Advanced VMware Cloud Foundation 9.0 Networking 3V0-25.25 Exam as PDF & Practice Test Engine
An administrator is troubleshooting east-west network performance between several virtual machines connected to the same logical segment. The administrator inspects the internal forwarding tables used by ESXi and notices that different tables exist for MAC and IP mapping. Which table on an ESXi host is used to determine the location of a particular workload for frame forwarding?
Correct Answer: C
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An administrator is configuring an NSX segment used by a nested hypervisor deployment where an ESXi VM runs on an ESXi host and multiple VMs run inside the ESXi VM. Which segment profile must be created to satisfy the request?
Correct Answer: A
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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.
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.
An administrator is tasked to create a development environment with a Tier-1 gateway to host overlay segments for only East/West workload communication. North/South communication is also required. The solution will not include the following services: NAT, DHCP, VPN. Which step must the administrator take when creating the Tier-1 gateway?
Correct Answer: C
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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?
Correct Answer: B
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An administrator is troubleshooting why workloads in NSX cannot reach the external network 10.100.0.0/16.
The Tier-0 Gateway is in Active/Active mode and has the following configuration:
* Uplink-1 (VLAN 100): 192.168.100.0/24 -> router R1 at 192.168.100.1
* Uplink-2 (VLAN 101): 192.168.101.0/24 -> router R2 at 192.168.101.1
* A static route for 10.100.0.0/16 was added with both next-hops (192.168.100.1 and 192.168.101.1).
* The Scope of this route is set to Uplink-1.
Symptoms:
* Virtual Machines (VMs) cannot reach 10.100.0.0/16
* Traceroute from the VM stops at the Tier-0 gateway with "Destination Net Unreachable"
* Pings from the Edge nodes to both 192.168.100.1 and 192.168.101.1 are success What explains why workloads in NSX cannot reach the external network?
The Tier-0 Gateway is in Active/Active mode and has the following configuration:
* Uplink-1 (VLAN 100): 192.168.100.0/24 -> router R1 at 192.168.100.1
* Uplink-2 (VLAN 101): 192.168.101.0/24 -> router R2 at 192.168.101.1
* A static route for 10.100.0.0/16 was added with both next-hops (192.168.100.1 and 192.168.101.1).
* The Scope of this route is set to Uplink-1.
Symptoms:
* Virtual Machines (VMs) cannot reach 10.100.0.0/16
* Traceroute from the VM stops at the Tier-0 gateway with "Destination Net Unreachable"
* Pings from the Edge nodes to both 192.168.100.1 and 192.168.101.1 are success What explains why workloads in NSX cannot reach the external network?
Correct Answer: D
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An administrator is troubleshooting intermittent connectivity failures between two workloads connected to NSX VLAN segments using Traceflow. In-band Network Telemetry (INT) has been enabled in the NSX Global Configuration. How does Traceflow identify issues in a VLAN network?
Correct Answer: D
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