What is the scope of a VPC within a region?

A Virtual Private Cloud (VPC) is designed to provide a logically isolated network within a cloud provider's environment, specifically within a particular region. The scope of a VPC encompasses all availability zones in that region, allowing resources deployed within the VPC to span across multiple availability zones. This design enhances the availability and resilience of applications by ensuring that if one availability zone goes down, the resources in another zone can continue to operate.

By spanning all availability zones, a VPC provides a robust architecture for load balancing and failover strategies while ensuring that resources can communicate with each other across different zones seamlessly. Thus, all the resources provisioned within that VPC can benefit from distributed infrastructures, thereby maximizing redundancy and minimizing the risk of outages.

The other options, while addressing various aspects of a VPC, do not accurately represent its full operational scope in relation to a region. The limitation of a VPC to a single availability zone or the belief that it can only connect to on-premise data centers misrepresents its design, which primarily focuses on flexibility and integration across multiple zones. Moreover, the existence of limitations regarding resources is inherent in cloud environments, as resources are defined by the quotas and configurations set by the cloud provider.