Cisco Content Delivery Engines (CDEs) are a family of carrier-class appliances that power the Cisco Content Delivery System (CDS), an innovative, network-based, modular platform for video delivery. The Cisco CDS delivers an unprecedented level of scalability and reliability while giving service providers a distinct service-velocity advantage in enabling the next generation of personalized entertainment and interactive media. The Cisco CDS platform combines Cisco CDEs with Content Delivery Applications (CDAs), software elements that provide ingest, storage, caching, personalization, streaming, and other real-time, scalable, and resilient capabilities. Cisco CDEs and CDAs can be flexibly configured to support a host of networked value-added services that service providers can rapidly deploy to attract and retain subscribers.