VMware 6V0-21.25 Dumps (V8.02) Are for Your VMware vDefend Security for VCF 5.x Administrator Exam Preparation: Read 6V0-21.25 Free Dumps (Part 1, Q1-Q40)

1. An administrator is troubleshooting a Distributed Firewall policy and sees a "Failed" status in the 'Action' column next to the policy name.

What is the first action the administrator should take to identify the cause of the failure?

2. An IT Operations team is tasked with automating the creation of 50 new firewall policies for different applications. They plan to use the NSX Policy API. To ensure the rules are created in the correct order within each policy, they must specify the `sequence_number` for each rule.

What happens if they create a new rule via the API and do not specify a `sequence_number` in the payload?

3. A security administrator is concerned about a new ransomware attack that is exploiting a known vulnerability (CVE-2025-1234) to spread between servers. The IT team is unable to patch the affected servers immediately.

How can the administrator use vDefend Advanced Threat Prevention to block this specific attack vector?

4. An Auditor is reviewing the gateway firewall configuration for a production Tier-0 Gateway. They need to verify which rules are being hit most often to ensure that high-volume traffic is being processed by the intended 'allow' rules and not by the final 'deny' rule.

How can the Auditor find this information in the NSX Manager UI?

5. A system administrator is troubleshooting a new vDefend Distributed Firewall policy. A rule in the 'Application' category, "Block-SSH", is intended to block SSH (TCP/22) to the 'DB-Servers' group. However, administrators find they can still SSH to the database servers.

Upon review, they find the following policy configuration:

Category: Infrastructure

Policy: P-Infra

Rule: 1001

Source: jump-box-group

Destination: ANY

Service: SSH

Action: Allow

Applied To: DFW

Category: Application

Policy: P-App-DB

Rule: 2001

Source: ANY

Destination: DB-Servers

Service: SSH

Action: Drop

Applied To: DB-Servers

What is the most likely reason the "Block-SSH" rule (2001) is failing?

6. A security administrator is configuring a vDefend Gateway Firewall policy to control outbound web access for a set of workloads. The goal is to block users from accessing websites categorized as "Gambling" and "Adult."

Which two components must be configured on the Tier-1 Gateway to achieve this? (Choose 2.)

7. An administrator is preparing to deploy vDefend security for a new Virtual Private Cloud (VPC) in a VCF 9.0 environment. This VPC will host a critical production application that requires both East-West micro-segmentation and North-South stateful firewalling.

Which licenses must be assigned to the environment to enable *both* the vDefend Distributed Firewall (DFW) for East-West rules and *stateful* vDefend Gateway Firewall (GFW) for North-South rules for this VPC? (Select all that apply.)

8. An organization is required to comply with PCI-DSS, which mandates protection against malware for all systems in the Cardholder Data Environment (CDE).

Which VMware vDefend feature is specifically designed to meet this requirement by safeguarding private cloud workloads against ransomware and malicious activity?

9. An auditor is reviewing the vDefend Advanced Threat Prevention configuration. They want to know what types of files can be analyzed by the Gateway Malware Detection feature.

According to the documentation, which file types are analyzed by vDefend Gateway Malware Detection? (Select all that apply.)

10. An administrator is implementing a zero-trust policy for a new application.

What is the primary function of setting the 'Applied To' field in a vDefend Distributed Firewall (DFW) policy?

11. A network administrator is reviewing the traffic flow for a new application deployment. The goal is to ensure all traffic *between* the application server (VM-App-01) and the database server (VM-DB-01) is inspected for security threats.

Both VMs reside on the same ESXi host and the same logical segment.

Which VMware vDefend component is responsible for enforcing firewall policies on this specific traffic path?

12. A security administrator is configuring a new Tier-1 Gateway on an NSX Edge node and wants to enable URL filtering to block access to social media websites.

Which other feature must be enabled first for URL filtering to function?

13. A cloud architect is designing a security solution for a multi-tenant VMware Cloud Foundation environment. A key requirement is to provide granular, application-aware security policies for workloads, including containerized applications. Another requirement is to inspect traffic for known vulnerability exploits *before* it reaches the workload, without causing network bottlenecks.

Which vDefend components should the architect use to meet these specific requirements? (Choose 2.)

14. A security architect is designing a solution to meet PCI-DSS compliance, which mandates the use of IDS/IPS to protect the cardholder data environment (CDE). The architect is using vDefend Distributed IDS/IPS.

To reduce the computational overhead on the ESXi hosts and minimize false positives, the architect applies a "virtual patching" strategy.

Which of the following describes this strategy?

15. A developer is using a script to query the NSX Manager for all security groups within the 'default' domain. The script makes the following API call: `GET https://nsx.corp.local/policy/api/v1/infra/domains/default/groups`

The JSON response includes a "cursor" field at the end.

What does the presence of this field indicate?

16. A security administrator is configuring a vDefend Malware Prevention profile. The administrator wants to ensure that any file not recognized by local analysis is sent to the cloud for advanced analysis.

Which feature must be configured in the Malware Prevention profile to send unknown files to the advanced sandbox environment?

17. A SOC Analyst receives a high-priority alert from the vDefend Security Overview dashboard. The alert details a ransomware campaign detected in progress, referencing multiple file-write-denied events and lateral movement attempts.

Which vDefend Advanced Threat Prevention features are collaborating to detect and stop this attack? (Select all that apply.)

18. A security architect is explaining the vDefend architecture to a new administrator. The architect needs to clarify which components provide which specific security functions.

Which vDefend component uses a distributed analytics engine to analyze workload and network context to develop and recommend micro-segmentation policies?

19. A DevOps engineer needs to programmatically create a new Distributed Firewall policy using the NSX Policy API. The policy should be named "api-policy" and be placed in the "Application" category.

Which API call and payload are correct for this action?

20. A developer is deploying a new application in a VCF environment. The application has two VMs: `app-vm-1` and `app-vm-2`. Both VMs are on the same logical segment and reside on the same ESXi host.

A firewall rule is created in the vDefend Distributed Firewall to block all traffic between `app-vm-1` and `app-vm-2`.

Where is this security policy enforced?

21. What underlying VMware technology does vDefend Distributed Malware Prevention leverage to gain access to the file system operations within a guest virtual machine?

22. 1.A security administrator is deploying VMware Cloud Foundation (VCF) and wants to understand how VMware vDefend secures internal data center traffic.

What is the primary architectural component of vDefend designed to inspect and control East-West (server-to-server) traffic?

23. A system administrator is reviewing the firewall policy table and is confused by the different categories. They have a new rule to allow backup traffic (TCP 2500) from all application servers (`grp-app-servers`) to the central backup server (`10.0.0.50`). The administrator wants to ensure this rule is processed after any emergency rules but before any application-specific rules.

vDefend Distributed Firewall Categories:

[ Ethernet ] [ Emergency ] [ Infrastructure ] [ Environment ] [ Application ]

In which category should this backup rule be placed?

24. A Cloud Architect is designing a security policy for a new DMZ in a VCF environment. The design includes a Tier-1 Gateway acting as the perimeter firewall for web servers. The architect's primary concern is stopping malware, including zero-day threats, from being uploaded by external users to the web servers.

Which vDefend Advanced Threat Prevention features should be enabled on the Tier-1 Gateway to provide the most comprehensive protection against this specific threat? (Select all that apply.)

25. A junior security administrator is troubleshooting a new firewall policy. They have configured a rule in the vDefend Gateway Firewall (GFW) to block all SSH (TCP/22) traffic from a test VM (192.168.50.10) to a development server (192.168.50.20). Both VMs are on the same subnet and attached to the same L2 segment. The administrator observes that the SSH connection is still successful.

Why is the vDefend Gateway Firewall rule not blocking this traffic?

26. An administrator is troubleshooting a policy realization failure for a Distributed Firewall (DFW) rule in the "Application" category. The rule fails to apply to any workloads. After clicking the "Failed" status, the administrator sees a "Deleted_Object" error message in the rule's `Source` field.

This policy was recently imported from another VCF environment.

What is the most likely cause of this error?

27. A SOC analyst is reviewing alerts from VMware vDefend and notices an alert for a "Protocol Anomaly."

Which of the following would be an example of this type of anomaly detected by NTA?

28. A network administrator is designing a security policy for a new VMware Cloud Foundation (VCF) deployment.

What is the primary role of the VMware vDefend Gateway Firewall?

29. A security architect is designing a Zero Trust micro-segmentation strategy using vDefend Security Intelligence. The architect has started a flow discovery session for a critical application.

What types of information does vDefend Security Intelligence collect to build its application topology map and recommend firewall rules? (Select all that apply.)

30. A security administrator is configuring a new vDefend Gateway Firewall rule on a Tier-0 Gateway to block traffic from a specific country known for malicious activity. The administrator has already enabled GeoIP Auto Update.

What is the correct procedure to implement this block?

31. A security administrator is using the vDefend Security Intelligence "Discover & Take Action" tool to analyze traffic for a new application. The tool shows a flow from a VM in `grp-web` to a VM in `grp-db` over TCP port 3306, which is unexpected. The administrator wants to confirm this is not a false positive from the tool.

What is the most effective next step to troubleshoot and validate this specific network flow?

32. What is the primary role of the VMware vDefend Network Sandbox in the context of malware prevention?

33. A vDefend administrator has made several changes to a Distributed Firewall policy and wants to test them before making them active.

What feature allows the administrator to save these changes without applying them to the data plane?

34. What is the primary function of Network Traffic Analysis (NTA) within the VMware vDefend platform?

35. A security administrator is troubleshooting a DFW policy. A rule designed to block RDP access from the `grp-contractors` group to the `grp-prod-servers` group is not working. The administrator checks the ESXi host log `dfwpktlogs.log` and finds the following entry for the denied traffic:

2025-11-04T12:00:01.123Z esx-01a dfwpktlogs: 32a8c4f0 INET match PASS 1005 IN 60 TCP 192.168.10.100/51234->192.168.20.20/3389 S

The administrator confirms the following:

- Rule 1005 is the default `any-any-allow` rule in the 'Application' category.

- The blocking rule (ID 2010) is in the 'Environment' category and is configured as `Source: grp-contractors`, `Destination: grp-prod-servers`, `Service: RDP`, `Action: Drop`.

- The 'Applied To' for rule 2010 is set to `grp-prod-servers`.

- The source VM (192.168.10.100) is confirmed to be in `grp-contractors`.

Why is the traffic being allowed?

36. A security administrator is responding to a newly discovered zero-day vulnerability. The administrator needs to immediately block all attempts to exploit this vulnerability across the entire data center, ensuring this new block rule is evaluated before any other existing firewall rules.

Which of the following actions must the administrator take to create a vDefend Distributed Firewall policy that meets this requirement? (Select all that apply.)

37. A cloud architect is explaining the benefits of the vDefend Distributed Firewall (DFW) architecture for securing East-West traffic.

What is a key advantage of this distributed architecture compared to traditional perimeter firewalls?

38. A cloud architect is designing a hybrid application deployment that includes both traditional Virtual Machines and Kubernetes Pods running on a VCF with Tanzu environment. A primary security requirement is to enforce a consistent micro-segmentation policy that controls traffic between the VMs and the Pods, as well as traffic between Pods.

Which vDefend components and technologies are required to achieve this unified security posture? (Select all that apply.)

39. A security administrator is troubleshooting why a vDefend Gateway Firewall (GFW) rule is not blocking traffic as expected. The traffic is confirmed to be routing through the correct Tier-1 Gateway where the GFW policy is applied. The administrator suspects the issue is related to rule order and policy categories.

When the system evaluates a packet against the GFW, in which order are the rule categories processed?

40. A network administrator is configuring firewall rules on a Tier-0 Gateway that has been configured in an Active/Active high availability mode. The administrator notes that some security features are not available for configuration.

Which two vDefend Gateway Firewall features are not supported on an Active/Active Edge configuration as of vDefend 9.0? (Choose 2.)