A cloud engineer needs to increase the capacity of a single application server that is struggling under a heavy workload. The engineer adds more CPU cores and RAM to the existing virtual machine. What type of scaling does this action represent?
Horizontal scaling
Scheduled scaling
Diagonal scaling
Vertical scaling
This scenario describes vertical scaling, which involves increasing the resources (such as CPU, RAM, or storage) of a single node. It is also known as scaling up. Horizontal scaling, or scaling out, would involve adding more servers to distribute the workload instead of enhancing a single one. Since the action was to add resources to the existing server, vertical scaling is the correct answer.
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