WPA is WiFi Protected Access - it's the most common method of encryption used to secure a wireless network. If you have a laptop or smartphone and you're trying to connect to a WiFi network, you'll usually need to enter a WPA key (or password) in order to connect to it.
In the live-action adaptations by Sir Peter Jackson, Sauron is portrayed by Benedict Cumberbatch in The Hobbit trilogy (who also portrays Smaug in the same trilogy) and was played by Sala Baker and voiced by Alan Howard in The Lord of the Rings trilogy.
The voice of Sauron is provided by Felix Felton. 1968: The Hobbit (1968 radio series): Sauron is mentioned only very briefly at the end; Gandalf and Elrond discuss how the Necromancer had been driven from his abode in the south of Mirkwood. 1979: The Hobbit (1979 radio series): 1979: The Lord of the Rings (1979 radio series): Video games