The company is implementing XenDesktop globally for desktop virtualization. How should the architect recommend installment of controllers for high availability?

Placing two controllers in London and two in Paris limits the geographic diversity and resilience against broad regional outages in Europe.

While New York and Hong Kong offer excellent global separation, the New York and London pairing is a common and practical intercontinental choice for global enterprises, often balancing geo-redundancy with latency for controller-to-controller communication within a single site.

Installing two controllers in Hong Kong and two in Tokyo provides insufficient geographic separation for comprehensive global disaster recovery.

Deploying two Delivery Controllers in each of two major global hubs, like New York and London, ensures local high availability within each data center. This architecture also provides robust intercontinental disaster recovery, allowing services to continue from the surviving location if one data center completely fails, balancing redundancy with practical network considerations.