1Y0-201 · Question #147
Scenario: A Citrix Administrator provisions 50 server OS machines to host applications. The administrator assigns a delivery group to the machine catalog containing the server OS machines. When…
The correct answer is C. Add the appropriate exclusions to the firewall rules on the virtual machine. D. Ensure time synchronization between the Virtual Delivery Agent and the Delivery Controller. A single unregistered VDA typically indicates a network firewall blockage or a time skew preventing the VDA-to-Delivery-Controller registration handshake.
Question
Scenario: A Citrix Administrator provisions 50 server OS machines to host applications. The administrator assigns a delivery group to the machine catalog containing the server OS machines. When viewing the delivery group in Citrix Studio, the administrator discovers that one of the server OS machines is unregistered. Which two actions should the administrator take to resolve this issue? (Choose two.)
Options
- ARestart the Delivery Controller.
- BEnsure that the machine catalog is NOT in maintenance mode.
- CAdd the appropriate exclusions to the firewall rules on the virtual machine.
- DEnsure time synchronization between the Virtual Delivery Agent and the Delivery Controller.
How the community answered
(15 responses)- A7% (1)
- B13% (2)
- C80% (12)
Why each option
A single unregistered VDA typically indicates a network firewall blockage or a time skew preventing the VDA-to-Delivery-Controller registration handshake.
Restarting the Delivery Controller is a disruptive action that affects all sessions and is not a targeted remedy for a single unregistered machine.
Maintenance mode on a machine catalog prevents new connections from being brokered but does not interfere with VDA registration status.
The VDA communicates with the Delivery Controller over specific TCP ports; if firewall rules on the virtual machine block this traffic, the VDA cannot complete registration and appears as unregistered in Studio.
VDA registration relies on Kerberos-based authentication, which requires the VDA and Delivery Controller clocks to be within five minutes of each other; a time synchronization gap will cause registration to fail for the affected machine.
Concept tested: VDA registration failure - firewall rules and time synchronization
Source: https://docs.citrix.com/en-us/citrix-virtual-apps-desktops/manage-deployment/vda-registration.html
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