Cloud Architecture refers to the design and structure of systems that operate in the cloud. It involves various components, including servers, storage, databases, and networking, all working together to deliver services over the internet. This architecture allows businesses to access resources on-demand, improving flexibility and scalability. Key elements of Cloud Architecture include front-end interfaces, which users interact with, and back-end services that manage data and applications. Different models, such as Infrastructure as a Service (IaaS) and Platform as a Service (PaaS), provide varying levels of control and management, catering to diverse business needs.