What is a key advantage of using a community cloud?

A key advantage of using a community cloud is cost-sharing among organizations. In a community cloud model, multiple entities with shared concerns or interests (such as regulatory compliance, security requirements, or jurisdictional needs) collaborate to host their infrastructure and services on a common platform. This collaborative approach allows these organizations to pool their resources, which leads to reduced costs compared to hosting individual private clouds.

With shared infrastructure expenses, these organizations can leverage advanced technology without the high financial burden of maintaining their own systems independently. In addition to cost benefits, the community cloud can enhance performance and tailored services that are specifically suited to the collective needs of the organizations involved, facilitating better collaboration and resource sharing while ensuring compliance with specific requirements.

The other options highlight features that are generally associated with different cloud models or do not accurately represent the community cloud's primary benefit. Exclusive access for a single entity characterizes private clouds, while enhanced physical security features and automatic scaling without configuration are features that can be associated with various cloud environments, but they do not specifically address the unique benefits tied to a community cloud structure.