I hope this question isn't out of place here, but can anyone explain to me what the 'TcpNumConnections' registry key does? The description has me confused; I'm not sure what Microsoft means by 'connection' in 'Specifies the maximum number of connections that TCP can have open simultaneously.'
Does this key define the total number of active TCP connections my machine can have open at a time, i.e. any sockets in any non-closed state?
Or does this key define the maximum number of parallel connection attempts, i.e. sockets that are in a LISTEN/SYN_RCVD/SYN_SENT state?