Which type of cloud service involves an integrated arrangement of two or more cloud servers?

The hybrid cloud is characterized by an integrated arrangement that combines resources from both public and private cloud environments. This integration allows organizations to maintain critical operations in a secure private cloud while leveraging the scalability and flexibility of public cloud resources for less sensitive tasks.

This dual approach enables businesses to optimize their cloud strategy, ensuring they can efficiently allocate resources based on specific needs. For instance, sensitive data can remain within the private cloud, while less critical applications can utilize the public cloud's resources, providing a balance of control and scalability.

In contrast, the other options represent different cloud models that do not inherently integrate multiple cloud servers in the same manner. A public cloud is fully hosted by third-party providers, a community cloud is shared among several organizations with common concerns, and a private cloud is dedicated exclusively to a single organization. Thus, the hybrid cloud's defining feature of integrating multiple cloud services distinctly sets it apart as the correct answer.