VMware Updated 6V0-21.25 Exam Questions and Answers by juliet

The VMware vDefend (NSX) control plane is divided into two distinct components to ensure maximum scalability and resiliency: the Central Control Plane (CCP) and the Local Control Plane (LCP).

Central Control Plane (CCP): This resides logically on the NSX Manager cluster. It computes the overall network and security topology based on the administrator's intent.

Local Control Plane (LCP): This resides directly on every individual ESXi host (and Edge Node) as a daemon/service (specifically the nsx-proxy and netcpa agents). The CCP pushes the calculated state down to the LCP on the host. The LCP is then responsible for programming those specific rules directly into the host's Data Plane (the hypervisor kernel modules). By keeping an LCP on the ESXi host, the host can continue to enforce security rules and route traffic even if it temporarily loses connectivity to the central NSX Managers.

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The VMware vDefend (NSX) architecture is strictly divided into distinct planes.

The Management Plane (hosted on the NSX Manager cluster) acts as the single point of entry for user interaction. It provides the graphical user interface (UI) and hosts the advanced REST API endpoint. Any automation script, orchestration tool (like Aria Automation or Terraform), or administrator configuring security policies must communicate directly with the Management Plane via API. The Management Plane then passes the intent to the Control Plane (which calculates the state) and ultimately down to the Data Plane (which actually drops or forwards the network packets).

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Gateway IDS/IPS is an incredibly resource-intensive service. Unlike basic stateful firewall rules that just check IP headers and ports, Gateway IDS/IPS performs complex Deep Packet Inspection (DPI) against thousands of threat signatures for heavy North-South perimeter traffic. Furthermore, it often handles TLS Inspection (Decryption), which requires massive CPU and memory allocations.

Because of these heavy computational requirements, VMware restricts the deployment of Gateway IDS/IPS to Edge Nodes deployed with a minimum form factor size of Large . Deploying this service on Small or Medium Edge nodes is unsupported, as they lack the compute resources and would immediately bottleneck data center traffic.

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