1Y0-312 Advanced Site Architecture Practice Question
A Citrix architect is designing a new Citrix Virtual Apps and Desktops 7 Site. The architect needs to determine the minimum number of Delivery Controllers required to provide high availability for the Site database and brokering services. What is the minimum number of Delivery Controllers that should be deployed?
⚠ Common exam trap
The trap here is overestimating the minimum number, thinking that more controllers are always needed for high availability, when two is sufficient.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Two
The minimum number of Delivery Controllers for high availability is two. This ensures that if one controller fails, the other can continue to broker sessions and manage the Site. While more controllers can be added for scalability or zone-specific needs, two is the baseline for redundancy in a production environment.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Four
Why it's wrong here
Four Delivery Controllers would provide even greater redundancy, but it is not the minimum. High availability is achieved with two controllers; additional controllers are for scaling or geographic distribution. For a standard Site, two is the recommended minimum, so four is unnecessary for the stated requirement.
- ✗
Three
Why it's wrong here
While three Delivery Controllers can provide additional redundancy and load distribution, it is not the minimum required for high availability. Two controllers are sufficient to eliminate a single point of failure. Deploying three might be considered for very large environments, but it exceeds the minimum requirement for basic high availability.
- ✓
Two
Why this is correct
Deploying at least two Delivery Controllers ensures high availability for brokering services. If one controller fails, the other can continue to handle session launches and management tasks. This is the minimum recommendation for a production Site to avoid a single point of failure. Additional controllers may be needed for scale, but two is the baseline for redundancy.
- ✗
One
Why it's wrong here
A single Delivery Controller creates a single point of failure for brokering services. If that controller becomes unavailable, users cannot launch sessions, and the Site cannot be managed. While the database can be separate, the controller itself must be redundant to ensure continuous operation. Therefore, one controller does not meet high availability requirements.
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official Citrix exam blueprint
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