SG0-001 · Question #483
A director with a highly available configuration will have which of the following power supplies installed at a MINIMUM?
The correct answer is A. N + 1. For a highly available configuration, a minimum of N+1 power supplies are installed to provide redundancy against a single power supply failure.
Question
A director with a highly available configuration will have which of the following power supplies installed at a MINIMUM?
Options
- AN + 1
- BN
- C2 * N
- DN + 2
How the community answered
(42 responses)- A86% (36)
- B2% (1)
- C7% (3)
- D5% (2)
Why each option
For a highly available configuration, a minimum of N+1 power supplies are installed to provide redundancy against a single power supply failure.
N+1 redundancy is the standard for high availability, meaning there is one more component than strictly required for operation. This configuration allows for one component (in this case, a power supply) to fail without interrupting the system's availability.
N power supplies means there is no redundancy; if one fails, the system may cease to function or degrade.
2 * N power supplies offer a higher level of redundancy than N+1 but are not the minimum for a highly available configuration.
N+2 power supplies offer redundancy for two simultaneous failures, which exceeds the minimum requirement for basic high availability provided by N+1.
Concept tested: High availability and N+1 redundancy
Source: https://learn.microsoft.com/en-us/azure/architecture/resiliency/recovery-pattern
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