"Is this system operating in a multi-protocol network?" One feature of Transport is the ability to use the "Congestion Experienced" field in the ConnectionLess Network Service (CLNS) routing header, and to implement a "Congestion Avoidance" scheme in heavily congested networks. The CLNS Congestion Experienced field is used by routers that support this feature (such as DECnis) to give an early indication of congestion. When Transport receives data that passed through a network path where the "Congestion Experienced" bit is set, Transport reduces the transmit rate of the sending end system to help alieviate network congestion. While this feature works well in networks where all network protocols support "Congestion Avoidance" mechanisms, it has been noted that in some heavily congested multi- protocol networks this feature can negatively impact the performance of DECnet-Plus compared to other protocols. Therefore, HP recommends that Transport Congestion Avoidance be disabled when using DECnet-Plus in heavily congested, multi-protocol networks, if other network protocols do not implement a similar mechanism. Answering "Yes" to this question will disable the congestion avoidance algorithm.