When the runtime is shutting down, the interface closes all the open connections, as per the Microsoft documentation. Sometimes, with some network drivers, this takes a significant amount of time. Setting this variable "On" causes the interface not to close the connections. Though this can speed up the runtime (during shutdown), it is not recommended, since the Microsoft documentation is not being followed. While the default value is "Off" (false, no), this configuration variable can also take the value of "On" (true, yes).