6V0-21.25 Practice Questions

When configuring a specific Distributed Firewall (DFW) Policy Section via the vDefend management plane, administrators have access to several foundational toggles:

Stateful (Option B): You can toggle whether the rules within this specific policy section should be processed statefully (maintaining a connection flow table to automatically allow return traffic) or statelessly.

Locked (Option C): You can toggle the lock icon to claim ownership of the policy section, preventing other administrators from making concurrent, conflicting edits to your rules.

TCP Strict is an advanced global setting/profile rather than a basic policy section configuration option, and Open is not a valid terminology state for a policy section in the vDefend UI.

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Antrea is VMware's Kubernetes-native Container Network Interface (CNI) utilized for micro-segmenting container pods.

Option A is True: Architecturally, Antrea deploys an antrea-agent component on every single Kubernetes Worker Node (typically as a DaemonSet). This agent is responsible for programming the Open vSwitch (OVS) datapath on that specific node to enforce pod routing and security policies.

Option B is True: A massive advantage of integrating Antrea with vDefend (NSX) is unified security. The vDefend management plane synchronizes Kubernetes inventory (Pods, Namespaces). This allows security administrators to write "mixed" Distributed Firewall rules within a single policy framework—for example, permitting traffic from a traditional Virtual Machine (e.g., a DB server) directly to a Kubernetes Pod (e.g., a Web frontend) using dynamic tagging.

(Option C is False because the flow is reversed: the Controller computes the policies and pushes them down to the Agents. Option D is False because data plane agents run on worker/compute nodes, not the management cluster).

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The VMware vDefend Distributed Firewall (DFW) achieves its massive scalability by enforcing security directly in the ESXi hypervisor kernel at the specific virtual network interface card (vNIC) of every workload. To optimize memory and CPU performance, the hypervisor does not force every vNIC to evaluate every single rule in the entire data center.

Instead, it pushes down and maintains two specific tables locally in memory on a strict per-vNIC basis :

Rule Table (Option A): This contains only the specific firewall rules relevant to that exact vNIC (determined by the "Applied To" field in the firewall policy).

Flow Table (Option B): This tracks the active, stateful connections specifically originating from or destined to that exact vNIC, allowing the firewall to automatically permit return traffic without having to re-evaluate the Rule Table.

Within the vDefend Network Detection and Response (NDR) dashboard, every threat event is assigned an Impact Score (a numerical value typically ranging from 0 to 100) to help security operations teams prioritize their incident response.

This Impact Score is a calculated composite metric derived from two distinct factors:

Severity (Option D): This represents the potential theoretical damage the attack could cause to the environment if successful (e.g., a critical remote code execution vs. a low-level port scan).

Confidence (Option A): This represents how certain the AI/NTA engine is that this event is a true positive attack and not just benign, anomalous background noise.

"Campaign" and "Detector" are metadata tags used to group and identify the alert, but they are not the mathematical values used to calculate the Impact Score.

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When integrating container orchestration (like Kubernetes) with VMware vDefend, a Container Network Interface (CNI) plugin (such as Antrea) is utilized. The fundamental, non-optional requirement of a CNI is providing basic pod network connectivity (Option B). However, advanced features like East-West service load balancing (kube-proxy replacement), enforcing Kubernetes NetworkPolicies (security), and handling IP Address Management (IPAM) are considered optional or configurable functionalities depending on the specific CNI implementation and how the cluster is architected to integrate with vDefend.