The architecture Layer is the following:
User: represent the endpoints
Access: represent the storefront and Citrix Gateway
Control: represent the delivery controller, database, studio, license, director
Resources: represent the VDAs
Host: represent the hardware, fiscal server, storage, network, etc.
Page 33, 34 and 35from the hand book: https://docs.citrix.com/en-us/xenapp-and-xendesktop/7-15-ltsr/downloads/handbook-715-ltsr.pdf
The correct is A because the only optional layer on-pre is storefront and gateway
Management of the access layer is optional (the image below shows a comparison between the components associated with all layers in a typical Citrix Virtual Apps and Desktops design).
https://www.citrix.com/blogs/2019/09/17/citrix-cloud-and-the-shared-responsibility-model/#:~:text=Management%20of%20the%20access%20layer,Virtual%20Apps%20and%20Desktops%20design).
Access Layer is an option using Gateway as a Service (Workspace). There is no way to use Resource Layer on Citrix Cloud, it CAN be used with another public cloud vendor like Azure, GCP, AWS, etc., but not using Citrix Cloud
Management of the access layer is optional.
Separating the access layer, making it an optional component, and allowing for more flexibility around authentication and access when transitioning to cloud.
https://www.citrix.com/blogs/2019/09/17/citrix-cloud-and-the-shared-responsibility-model/#:~:text=Management%20of%20the%20access%20layer,Virtual%20Apps%20and%20Desktops%20design).
C is wrong, Citrix Cloud is not hosting any ressources/VDA/Worker for you. You can host your workers onPrem or on any other public/private Cloud Provider.
C is wrong, A is correct. Optional to use Gateway service (in access layer). Control layer consists of Delivery Controller, Sire database, Director, License server service, and they are NOT optional.
definitely the correct one is A
Reference:
https://www.citrix.com/blogs/2018/05/31/cloud-guidepost-understanding-the-control-plane-and-planning-the-access-layer/
Agree, Access layer is the correct answer here - so A is the answer
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