VMware New 2026 6V0-21.25 Test Tutorial (Updated 77 Questions)
6V0-21.25 Exam Questions Dumps, Selling VMware Products
VMware 6V0-21.25 Exam Syllabus Topics:
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NEW QUESTION # 12
Which of the following are valid Network Traffic Analysis detectors in vDefend ATP? (Select all that apply)
- A. DNS tunneling
- B. Vertical port scan
- C. Password brute force
- D. Unusual traffic pattern
Answer: A,D
Explanation:
VMware vDefend Network Traffic Analysis (NTA) focuses on behavioral anomalies and advanced evasive techniques rather than simple, noisy, signature-based events.
DNS Tunneling (Option A): This is a highly sophisticated detector. Attackers often encapsulate stolen data or Command & Control (C2) instructions inside standard DNS queries (because DNS is rarely blocked by firewalls). NTA uses Deep Packet Inspection (DPI) to detect this anomalous payload hiding in port 53.
Unusual Traffic Pattern (Option B): NTA uses machine learning to baseline normal East-West traffic in your data center. If a web server that normally only talks to a database server suddenly starts transferring gigabytes of data to an unknown internal workstation, this detector flags the anomaly.
(Note: Basic password brute force and simple vertical port scans are traditionally handled by the standard IDS/IPS signature engines, whereas NTA focuses on deeper, protocol-level anomalies and AI-driven deviations).
NEW QUESTION # 13
Which two components are leveraged by vDefend Security Intelligence to recommend segmentation policies?
(Choose two)
Response:
- A. Flow monitoring and traffic telemetry
- B. Distributed port mirroring
- C. Application-level dependency discovery
- D. Static IP mapping
- E. Guest OS license verification
Answer: A,C
NEW QUESTION # 14
What role is required to start and stop vDefend Intelligence data collection?
Response:
- A. Security Administrator
- B. Auditor
- C. Enterprise Administrator
- D. Cloud Administrator
Answer: C
NEW QUESTION # 15
Which two capabilities are provided by the Advanced Threat Prevention module in NSX?
(Choose two)
Response:
- A. Storage acceleration for vSAN clusters
- B. Inline malware scanning using sandboxing
- C. NSX Edge load balancing across multiple datacenters
- D. Snapshot isolation of encrypted VMs
- E. Real-time threat intelligence integration
Answer: B,E
NEW QUESTION # 16
Which of the following are valid logon detection methods for IDFW? (Select all that apply)
- A. Guest Introspection
- B. Event Log Scrapping
- C. Single Sign On (SSO)
- D. Identity Access Management
Answer: A,B
Explanation:
The VMware vDefend Identity Firewall (IDFW) allows administrators to create distributed firewall rules based on Active Directory user identities rather than just IP addresses. To do this, vDefend must accurately map a user's login to a specific VM's IP address. It achieves this mapping through two primary supported logon detection methods:
Guest Introspection: An agent-based method utilizing VMware Tools installed on the guest OS to detect logons locally.
Event Log Scraping: An agentless method where vDefend integrates directly with Active Directory to scrape security event logs and track authentication events across the network.
NEW QUESTION # 17
What is the primary role of a Gateway Firewall in a private cloud architecture?
Response:
- A. To monitor VM snapshot activity for security anomalies
- B. To apply policies to virtual desktop environments
- C. To inspect and control north-south traffic entering or leaving the data center
- D. To manage data deduplication and storage replication
Answer: C
NEW QUESTION # 18
In vDefend Malware Detection and Prevention, when does local file analysis occur?
- A. After Cloud file analysis and before hash comparison
- B. Before Cloud file analysis and after hash comparison
- C. After Cloud file analysis and after hash comparison
- D. Before Cloud file analysis and before hash comparison
Answer: B
Explanation:
The vDefend malware detection pipeline operates in a highly optimized sequence to minimize performance overhead and network bandwidth. When a file is extracted, the first step is to check its hash against a cache of known good/bad files (Hash Comparison). If the hash is unknown, the system proceeds to Local File Analysis (static analysis leveraging AI/ML models on the appliance). If the local analysis determines the file requires deeper inspection, it is only then sent off for Cloud File Analysis (dynamic sandboxing). Therefore, local analysis occurs strictly after hash comparison but before cloud analysis.
NEW QUESTION # 19
Which construct does vDefend use to associate containerized workloads with firewall policies?
Response:
- A. NSX Tags and Security Groups
- B. Overlay Transport Zones
- C. IP Pools
- D. Storage Profiles
Answer: A
NEW QUESTION # 20
Which three actions can NDR automation take in response to detected threats?
(Choose three)
Response:
- A. Generate alerts and forward to SIEM
- B. Quarantine the affected workload
- C. Update firewall rules dynamically
- D. Delete the VM snapshot to free up space
- E. Reallocate memory to the affected VM
Answer: A,B,C
NEW QUESTION # 21
What is the key benefit of using vDefend to secure containerized workloads in a private cloud?
Response:
- A. It enables centralized physical VLAN tagging
- B. It secures container traffic using hypervisor-level inspection and micro-segmentation
- C. It provides automatic OS patching inside Kubernetes clusters
- D. It disables inter-cluster routing for isolation
Answer: B
NEW QUESTION # 22
Which interface is used to configure the Gateway Firewall policies in VMware NSX?
Response:
- A. vSAN Health Dashboard
- B. ESXi CLI
- C. vCenter Host Client
- D. NSX Manager Tier-1/Tier-0 Gateway Policy View
Answer: D
NEW QUESTION # 23
How does the vDefend firewall architecture support horizontal scalability in private cloud environments?
Response:
- A. By distributing packet inspection only at the DMZ
- B. By using a single centralized rule engine for all traffic
- C. By assigning firewall processing to NSX edge nodes
- D. By embedding the enforcement logic into every hypervisor host
Answer: D
NEW QUESTION # 24
Which of the statements below are true about the Time-Based Firewall Policy capability?
(Select all that apply)
Response:
- A. Require all time-based rules to be defined in UTC time zone
- B. Can be applied at the vDefend Distributed Firewall and Gateway Firewall
- C. Can apply a different Security Policy based on day and time
- D. Cannot be combined with VDI, RDSH, and IDFW
Answer: B,C
NEW QUESTION # 25
What is the primary purpose of Network Traffic Analysis (NTA) in VMware NSX?
Response:
- A. To manage DHCP and DNS configurations
- B. To display physical switch interface status
- C. To monitor and identify abnormal traffic patterns within virtual networks
- D. To analyze VM snapshots and disk usage
Answer: C
NEW QUESTION # 26
Which capability of vDefend helps simplify the creation of firewall rules based on VM context?
Response:
- A. Manual host affinity mapping
- B. Automatic policy tagging using VM metadata
- C. Importing rules from the vSphere Events log
- D. Use of Logical Switch MACs
Answer: B
NEW QUESTION # 27
Which three key attributes define a vDefend firewall rule?
(Choose three)
Response:
- A. Destination
- B. Uplink Type
- C. Service
- D. Source
- E. Log Level
Answer: A,C,D
NEW QUESTION # 28
In a large-scale deployment, how can administrators reduce firewall rule sprawl and improve manageability?
Response:
- A. Use physical IP addresses in every rule
- B. Disable rule logging for all policies
- C. Create a rule for every individual VM
- D. Leverage security groups and tagging for policy abstraction
Answer: D
NEW QUESTION # 29
Which two VMware tools can be used to automate security policy enforcement across workloads?
(Choose two)
Response:
- A. vRealize Automation (vRA)
- B. NSX-T Command-Line Utilities
- C. VMware Horizon Console
- D. NSX Policy REST API
- E. vSphere Distributed Switch Manager
Answer: A,D
NEW QUESTION # 30
Which three types of contextual information can be used in vDefend's context-aware firewall policies?
(Choose three)
Response:
- A. User identity from directory services
- B. Application-level traffic metadata
- C. VM memory consumption
- D. Disk I/O patterns
- E. Operating system type
Answer: A,B,E
NEW QUESTION # 31
How does the Identity Firewall help enforce Zero Trust principles?
Response:
- A. It disables all default firewall rules upon installation
- B. It maps network sessions to authenticated user identities for policy enforcement
- C. It automatically encrypts inter-VM traffic
- D. It creates centralized NAT policies for north-south traffic
Answer: B
NEW QUESTION # 32
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