Which AWS service can be used to migrate existing Amazon EC2 instances from one AWS Region to another?
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Correct answer: AWS Application Migration Service.
Why this is the answer
AWS Application Migration Service (AWS MGN) is the correct choice because it is specifically designed to facilitate the rehosting of physical, virtual, and cloud-based servers, including Amazon EC2 instances, to AWS. It continuously replicates source servers to a staging area in the target AWS Region, minimizing downtime during the actual cutover. AWS Database Migration Service (AWS DMS) is incorrect because it focuses on migrating databases, not entire EC2 instances. AWS DataSync is incorrect as it's used for transferring large amounts of data between on-premises storage and AWS storage services, or between different AWS storage services, not for migrating running EC2 instances. AWS Migration Hub is incorrect because it provides a single location to track the progress of migrations from various AWS and partner solutions but doesn't perform the migration itself.
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