A cloud administrator is designing a critical application to ensure it remains operational even if a single server rack or its power source fails within a datacenter. The business has a very low tolerance for downtime. Which deployment strategy should the administrator implement to meet this high availability requirement?
Vertically scale the primary compute instance with more RAM and CPU.
Establish a strict firewall policy to block non-essential traffic.
Deploy application instances across multiple fault domains.
Implement a daily backup schedule to an adjacent storage array.
Distributing application instances across multiple fault domains ensures that the failure of a single physical hardware component, like a rack or power source, does not take down the entire application. A fault domain is a grouping of hardware within an availability zone that shares common infrastructure. A daily backup is a disaster recovery measure, not a high availability strategy, as it doesn't prevent downtime. Vertically scaling an instance improves performance but creates a single point of failure. A firewall policy is a security measure and does not protect against hardware failure.
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