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.
Deploy application instances across multiple fault domains.
Establish a strict firewall policy to block non-essential traffic.
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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