Max Pending Count: Enter the maximum number of pending connections to be allowed for an HTTP listener. The default is 4096.
Queue Size: Enter the maximum size of the connection queue, in bytes. This value also specifies the maximum number of outstanding connections the server can have. The default is 4096.
Receive Buffer Size: Enter the size of the receive buffer for an HTTP listener. The default is 4096.
Send Buffer Size: Enter the size of the send buffer for an HTTP listener. The default is 8192.