A server-side adaptive streaming capability is provided. The server-side adaptive streaming capability supports adaptive streaming of a data object from a server toward a client via a Transmission Control Protocol (TCP) connection between the server and the client. The server has access to a plurality of versions of the data object having a respective plurality of encoding bit rates associated therewith. The server has a TCP congestion control mechanism running for the TCP connection. The TCP congestion control mechanism has information associated therewith. The server determines, using the information associated with the TCP congestion control mechanism running on the server for the TCP connection, a transmission bit rate expected to be supported by the client for the TCP connection. The server selects, based on the transmission bit rate expected to be supported by the client and the encoding bit rates associated with the versions of the data object accessible to the server, one of the plurality of versions of the data object for propagation from the server toward the client via the TCP connection. The server dynamically switches between the versions of the data object as the transmission bit rate expected to be supported by the client changes.