CLOUD COMPUTING ARCHITECTURES AND THEIR IMPACT ON ENTERPRISE IT EFFICIENCY

Abstract

Cloud computing architectures have revolutionized enterprise IT by offering scalable, cost-effective, and resilient infrastructure models. This article evaluates various cloud architecture paradigms—Infrastructure as a Service (IaaS), Platform as a Service (PaaS), and Software as a Service (SaaS)—and their effects on operational efficiency, agility, and IT cost management in large-scale Pakistani enterprises. It explores architectural components, deployment models, integration with legacy systems, and associated performance metrics. A hybrid cloud framework is analyzed for its flexibility in supporting business continuity. Empirical data from Pakistani industry case studies substantiate the shift from traditional IT to cloud-based environments, highlighting gains in service uptime, reduced capital expenditure, and faster innovation cycles.