CompTIA Cloud+ Practice Test

What scaling option involves adding more resources to a single server instance?

1. Vertical scaling

2. Horizontal scaling

3. Edge cache

4. Cloud bursting

The correct answer is: Vertical scaling

The correct answer is vertical scaling, which refers to the practice of adding more resources—such as CPU, RAM, or storage—to a single server instance to boost its performance. This approach enhances the capability of existing hardware, allowing it to handle increased loads or improved performance demands without needing to add more machines. Vertical scaling is particularly beneficial in scenarios where software is not easily distributed across multiple servers or where a single-instance architecture is preferred for simplicity. This method can often be easier to implement since it typically involves upgrading a current server rather than configuring new instances, making it a straightforward choice for quickly enhancing performance. In contrast, horizontal scaling would involve adding more servers to distribute the workload, which is suitable for applications designed to load balance across multiple instances. Edge cache refers to a strategy for optimizing content delivery to end-users, and cloud bursting is a hybrid cloud solution that extends resources to a public cloud during peak demand. Understanding these distinctions helps clarify the benefits and applications of vertical scaling in cloud environments.