Telefonica Red Hat draft-lcnc-onsen-telco-cloud-00 Abstract Cloud infrastructures are becoming increasingly distributed, spanning centralized facilities and distributed edge sites, all of them interconnected through networks from one or more administrative domains. Services running on top of such computing enironments require dynamic placement, admission control, lifecycle management, and coordinated scaling across sites, requiring proper allocation and operation of both compute and network resources in order to preserve the required expectations from customers and providers. Existing orchestration systems often depend on fragmented visibility of infrastructure resources (in both compute and network domains) and must interact with multiple management systems before determining service feasibility. This document discusses the role of network abstractions in Telco- Cloud environments benefiting the interplay and operation of cloud and network domains, building up a true Telco-Cloud approach. It identifies abstraction dimensions that can simplify service orchestration while enabling scalable operation across heterogeneous network and cloud infrastructures.