The waterfall has been known as the Angel Falls since the Mid-20th century; they are named after Jimmie Angel, a US aviator, who was the first person to fly over the falls. Angel's ashes were scattered over the falls on 2 July 1960. The common Spanish name Salto Ãngel derives from his surname.
Integrated Services Digital Network (ISDN) is a set of communication standards for simultaneous digital transmission of voice, video, data, and other network services over the traditional circuits of the public switched telephone network. It was first defined in 1988 in the CCITT red book.
Software-Defined Networking (SDN) Software-defined networking (SDN) is a newly emerging computer networking architecture. Its main distinguishing factor is the separation of the data plane from the control plane in routers and switches. In other words, the control is decoupled from hardware and implemented in software.