An enterprise maintains legacy database systems in its on-premises datacenter to comply with strict internal regulatory standards. To support rapid business expansion, the enterprise deploys its new web frontends and application services in Microsoft Azure, connecting both environments using a dedicated, secure network connection. Which cloud deployment model is the enterprise utilizing?

Hybrid cloud: ### What Hybrid Cloud Is **Hybrid cloud** is a cloud computing deployment model that combines at least one **public cloud** environment (such as **Microsoft Azure**) with a **private cloud** or traditional **on-premises datacenter**. It establishes unified networking, management, and data integration across both environments, allowing data and applications to be shared seamlessly between them. ### How It Meets the Requirements - **Preserves on-premises investments**: The organization retains its legacy database servers locally within its own datacenter to fulfill regulatory and governance requirements. - **Leverages public cloud scale**: The enterprise hosts web and application layers in **Microsoft Azure** to take advantage of on-demand elasticity, managed infrastructure, and global reach. - **Connects environments securely**: Secure networking tools, such as **Azure ExpressRoute** or **Site-to-Site VPN**, link the on-premises infrastructure with Azure virtual networks to enable seamless cross-environment communication. ### Key Advantages and Capabilities - **Flexibility**: Enables workloads to run where they are most effective and cost-efficient. - **Regulatory compliance**: Allows sensitive assets to remain in localized on-premises infrastructure while non-sensitive workloads run in the public cloud. - **Phased modernization**: Facilitates gradual migration paths for legacy workloads without requiring complete initial overhauls. - **Operational continuity**: Provides disaster recovery and failover options across disparate environments. ### Why This Is Optimal A hybrid cloud model delivers the ideal balance between the strict control of on-premises operations and the high agility and scalability offered by public cloud platforms.

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