BL0-220: Nokia Bell Labs Distributed Cloud Networks

Network isolation provides logical separation between tenants, allowing each tenant to maintain an independent network configuration and preventing unintended cross-tenant communication. Microsoft documents tenant network isolation as a core property of virtualized networks, with traffic separated between tenants.

An underlay is the physical network infrastructure that supplies the transport and connectivity on which virtual or overlay networks operate.

Traditional monolithic services are typically tightly coupled and deployed as a single unit, which limits independent scalability. They are commonly provisioned with fixed capacity rather than being able to scale individual components independently.

Life cycle management establishes clearly defined stages for managing a product, service, or system from inception through retirement.

Cloud resources are delivered through virtualization, which abstracts the underlying physical infrastructure into consumable compute, storage, and networking resources.