Undersea fiber optic cable (like this one, made by TE Connectivity SubCom) makes up the backbone of the world's international communication network.
Contrary to the impression that satellites do the majority of the work, these cable networks carry >99% of transoceanic data connections. New records for cross-sectional capacity across transoceanic distances are still being achieved. (Photo: Courtesy of Tyco Electronics Subsea Communications LLC)
(Courtesy of Tyco Electronics Subsea Communications LLC)