A unit of Verizon Communications, Verizon Enterprise provides enterprise communications, managed network, and IT services to businesses, as well as state and federal government clients primarily in the US. The unit specializes in voice and data communications, network operations management, network security management, wholesale network access, and teleconferencing. Verizon Enterprise also offers services for the Internet of Things and machine-to-machine communications.  It serves customers in 140 countries, including nearly all of the Fortune 500, over its global network, as well as through partnerships with other regional carriers. US government clients include the US Department of Defense.