In telecommunications, a cloud is the unpredictable part of any network through which data passes between two end points.
Data center interconnect (DCI) is a segment of the networking market that focuses on the technology used to link two or more data centers so the facilities can share resources. There are many options for DCI connectivity and selecting the right one depends upon a wide range of variables, including the location of the data centers, the distance between data centers, bandwidth and availability requirements, the capabilities of local service providers and security concerns.
Network orchestration is a policy-driven approach to network automation that coordinates the hardware and software components a software application or service requires to run.
OpenStack Neutron is a cloud networking controller and a networking-as-a-service project within the OpenStack cloud computing initiative.
An SDN controller is an application in software-defined networking (SDN) that manages flow control to enable intelligent networking. SDN controllers are based on protocols, such as OpenFlow, that allow servers to tell switches where to send packets.