Which service uses public cloud resources for Disaster Recovery, providing an offsite DR site for businesses?

Disaster Recovery as a Service (DRaaS) is specifically designed to utilize public cloud resources to create a dedicated offsite disaster recovery solution for businesses. In this service model, organizations can replicate and host their physical or virtual servers in a cloud environment. This enables them to maintain business continuity and recover their critical data and applications in case of a disaster, such as server failures, natural disasters, or cyber incidents.

DRaaS integrates seamlessly with existing IT infrastructure and provides the scalability and flexibility that businesses need to ensure their recovery plans can adjust as demands change. By leveraging public cloud infrastructure, DRaaS allows for cost-effective disaster recovery solutions without the need for businesses to invest heavily in physical hardware for their DR sites.

In contrast, while SaaS, PaaS, and IaaS are fundamental cloud service models, they do not specifically focus on disaster recovery as a primary function. SaaS delivers software applications over the internet; PaaS provides a platform for developers to build applications without managing the underlying infrastructure; IaaS offers virtualized computing resources over the internet. While IaaS can be a component of DRaaS, DRaaS itself is tailored specifically for disaster recovery needs, making it the correct choice for this question