In the US, optimal 56k connections are able to send 53 kilobits per second (Kbps) to the client. Asymmetrical (or asynchronous) DSL and Cable Modems, the two most popular broadband services in the world today, have greatly improved downstream speeds in comparison with 56k, with speeds reaching over 7 Mbps. However, the overall download speed of a file is dependant on both the downstream of the user and the upstream of the server.
See also: Upstream