This white paper explains the need for multi-layer data center interconnection networks and how they need to support dynamic access to cloud applications and services. Today's multiple, costly, static networks require manual provisioning and intervention across multiple layers and. The global data center market is experiencing huge demand driven by enterprise digital transformation, changes to working practices and applications, services and workloads migrating to the cloud. Data centre operators that don't have the right infrastructure pieces in place will. At its core, interconnection refers to the private physical and virtual connectivity links between different networks, cloud providers and enterprises inside a data center.