Cyber ranges are valuable assets for cybersecurity training and education, advanced prototype development, and certification testing. To address the limitations of individual cyber ranges in terms of their capabilities and capacities to simulate complex realities and multi-sector dependencies, federated cyber ranges are emerging. This work presents the ECHO Federated Cyber Range, a marketplace for cyber range services, that establishes a mechanism by which the independent cyber range capabilities can be interconnected and accessed via a convenient portal for configuration and managemement. Its features and architecture are described in detail, along with the design,validation, and deployment of a training scenario.

This chapter discusses the evolution of cloud infrastructures and the impact of IoT. We discuss the need for heterogeneous resources integration in resource provisioning and the necessity to find the golden ratio between the cloud, fog and edge for optimal user experience. Complexity across the cloud-to-thing continuum is escalating rapidly. One way that cloud computing can adapt is to incorporate self-management and selforganization techniques and methods to preserve service availability and avoid user Quality of Service and Quality of Experience violations.

their end users, while maintaining or ideally reducing costs. To do this, testing and service quality assurance are essential. Notwithstanding this, the size and complexity of modern infrastructures make real-time testing and experimentation difficult, time-consuming, and costly. The RECAP Simulation Framework offers cloud and communication service providers an alternative solution while retaining accuracy and verisimilitude. It comprises two simulation approaches, Discrete Event Simulation (DES) and Discrete Time Simulation (DTS). It provides information about optimal virtual cache placements, resource handling and remediation of the system, optimal request servicing, and finally, optimal distribution of requests and resource adjustment, with the goal to increase performance and concurrently decrease power consumption of the system.