Operational excellence in distributed cloud and network platforms has emerged as a strategic imperative in the era of hyperscale computing, edge intelligence, and 5G-enabled connectivity. The rapid evolution of digital services, coupled with increasing user expectations for real-time responsiveness and uninterrupted availability, has transformed operational management from a support function into a core competitive differentiator. As enterprises progressively adopt multi-cloud architectures, hybrid cloud infrastructures, and software-defined networking (SDN) frameworks, the complexity associated with ensuring performance optimization, reliability assurance, cybersecurity enforcement, and cost governance has intensified significantly. Distributed environments now span geographically dispersed data centers, edge nodes, and virtualized network layers, demanding cohesive operational strategies that transcend traditional IT management paradigms. This review systematically examines the foundational principles, architectural frameworks, and enabling technologies that underpin operational excellence in distributed cloud–network ecosystems. Core domains analyzed include advanced observability frameworks (metrics, logs, distributed tracing), infrastructure automation and Infrastructure as Code (IaC) methodologies, Site Reliability Engineering (SRE) practices for measurable reliability, DevOps-driven CI/CD integration, and AI-driven Operations (AIOps) for predictive anomaly detection and automated remediation. The discussion further explores the impact of container orchestration platforms, particularly Kubernetes-based microservices management, alongside emerging paradigms such as intent-based networking (IBN) and edge-native architectures that enhance agility and latency-sensitive service delivery. Critical operational challenges—including vendor heterogeneity, interoperability constraints, latency determinism in edge and 5G networks, regulatory compliance and data sovereignty, and persistent organizational silos—are analyzed to highlight structural and governance-related limitations in contemporary distributed infrastructures. The review emphasizes the necessity of unified control planes, cross-layer automation, and integrated security models based on zero-trust architecture (ZTA) principles. Emerging trends such as autonomous networking, self-healing infrastructure, and sustainability-driven cloud optimization, including carbon-aware workload scheduling, are evaluated as transformative pathways toward resilient and intelligent operational ecosystems. By synthesizing technological, architectural, and governance perspectives, this review provides a structured and forward-looking framework for researchers and practitioners seeking to design scalable, adaptive, and high-performance distributed cloud and network platforms.\\n\\n