and fairness. MaxNet – Uses a single header field, which carries the maximum congestion level of any router on a flow's path. The rate is set as a function of this maximum congestion, resulting in max-min fairness. JetMax, like MaxNet, responds only to the maximum congestion signal, but also carries other overhead fields. Linux usage BIC is used by default in Linux kernels 2.6.8 through 2.6.18. (August 2004 – September 2006) CUBIC is used by default in Linux kernels since version 2.6.19. (November 2006) PRR is incorporated in Linux kernels to improve loss recovery since version 3.2. (January 2012) BBR is incorporated in Linux kernels to enable model-based congestion control since version 4.9. (December 2016) See also Low Extra Delay Background Transport (LEDBAT) Notes References Sources External links Papers in Congestion Control TCP Congestion Handling and Congestion Avoidance Algorithms The TCP/IP Guide Flow control (data) Network performance