The full form of SDN is Specially Designated Nationals And Blocked Persons List

As part of its enforcement efforts, OFAC publishes a list of individuals and companies owned or controlled by, or acting for or on behalf of, targeted countries. It also lists individuals, groups, and entities, such as terrorists and narcotics traffickers designated under programs that are not country-specific. Collectively, such individuals and companies are called “Specially Designated Nationals” or “SDNs.” Their assets are blocked and U.S. persons are generally prohibited from dealing with them. 

The full form of SDN is Software-defined networking. It’s used on Computer.

Software-defined networking (SDN) is the decoupling of the network control logic from the devices performing the function, such as routers, which control the movement of information in the underlying network. This approach simplifies the management of infrastructure, which may be specific to one organization or partitioned to be shared among several.

SDN features controllers that overlay above the network hardware in the cloud or on-premises, offering policy-based management. Technically speaking, the network control plane and forwarding plane are separated from the data plane (or underlying infrastructure), enabling the organization to program network control directly. This differs significantly from traditional data center environments. In a traditional environment, a router or switch — whether in the cloud or physically in the data center — will only be aware of the status of network devices adjacent to it. With SDN, the intelligence is centralized and prolific; it can view and control everything.

The SDN Architecture is: