Discovery and Launch (DIAL) is a protocol co-developed by Netflix and YouTube with help from Sony and Samsung.
[1] It is a mechanism for discovering and launching applications on a single subnet, typically a home network.
The protocol works without requiring a pairing between devices.
It was formerly used by the Chromecast media streaming adapter that was introduced in July 2013 by Google.
)[2] DIAL enables what the TV industry calls second screen devices, such as tablet computers and mobile phones to send content to first screen devices, such as televisions, Blu-ray players, and set-top boxes.