An administrator needs to distribute NDB management plane components.

NDB High Availability (HA) is a feature that ensures the availability and reliability of the NDB management plane components, such as the API Server, the Repository VMs, and the NDB Agents. To enable NDB HA, you need to deploy at least three HA Proxy VMs on the same L2 network as the NDB Server VM. The HA Proxy VMs act as load balancers and health monitors for the NDB management plane components, and they also provide a single endpoint for accessing the NDB APIs and UI. References:

Nutanix Certified Professional - Database Automation (NCP-DB), Section 2 - Deploy and Configure an NDB Solution

Database (NCP-DB) Exam Blueprint Guide - Nutanix, Page 7, Objective 2.3

Nutanix Database Management & Automation (NDMA) course, Module 2, Lesson 2.3 - NDB High Availability