NCP-EUC Premium Exam Questions

For a Citrix VDA (Virtual Delivery Agent) to successfully register with the Delivery Controller, it must establish a secure communication channel which relies heavily on Kerberos authentication.

A common cause for registration failure on startup, particularly in new deployments or non-persistent environments, is that the Time is off on the machines. If the system clock of the virtual desktop drifts more than 5 minutes from the domain controller or the Delivery Controller, Kerberos ticket generation fails. This prevents the VDA from authenticating with the Broker Service, resulting in a "Unregistered" state in Citrix Studio. While Windows 11 has strict hardware requirements (Option A), failing to meet those usually prevents the OS from booting or installing entirely; if the OS boots but fails to register, time synchronization is the most probable infrastructure cause.

According to the Nutanix Network Configuration and RDMA guidelines, uniformity of the physical network layer is a strict requirement for enabling RDMA over Converged Ethernet (RoCE).

Specifically, Nutanix does not support mixing network cards with different speeds within the same cluster when RDMA is involved. If the cluster contains a mix of nodes where some are connected at 10 Gbps and others at 25 Gbps (or higher), the Prism interface will disable (grey out) the RDMA configuration options to prevent an unsupported or unstable fabric configuration. To resolve this and proceed with enabling RDMA network segmentation, the administrator must ensure that all RDMA-capable NICs across all nodes are operating at the same supported speed (typically 25 Gbps or higher).

This is because registration kiosks are used by multiple customers who do not need to personalize their desktops or applications, and who only need to perform a specific task such as registering or checking in. Non-persistent desktops can provide a secure and consistent user experience for these customers, and also reduce management overhead for the organization.

In Nutanix Prism Central, the Capacity Runway scenario provides details on the available capacity for the next 12 months based on the current usage pattern. This feature can help the administrator to plan and prepare the budget for the next fiscal year. The administrator can use this information to decide whether more resources need to be added to the Nutanix cluster or if the existing resources are sufficient.

Prism Central planning tools can help you estimate the capacity runway of your cluster by considering the storage, CPU, and memory capacity. However, you need to have at least 21 days of data from a cluster to calculate the baseline runway estimates4.