Which of the following is NOT a key field of cloud management referred to by FCAPS?

FCAPS is an acronym that stands for Fault, Configuration, Accounting, Performance, and Security management. These fields are fundamental to the effective management of network services and provide a framework for managing complex network systems, especially in cloud technologies.

Application management is not included in the FCAPS framework, which is why it is the correct answer for this question. Instead, FCAPS focuses on managing the underlying infrastructure of the network, with specific attention given to fault management for identifying and resolving issues, configuration management for maintaining consistent network configurations, performance management to ensure optimal operation of the network, and accounting management (often tied to resource usage and billing) to keep track of resource consumption.

By recognizing that application management falls outside the core principles of FCAPS, one can understand that the focus of cloud management encompasses the broader and more technical aspects of infrastructure rather than specific application-layer aspects, which are usually handled by other methodologies or frameworks.