L is sent.
S and issues two INITs in response. This case is brought up now so that people will think about it before the Atlantic City meeting and comment whether their NCP can tolerate it. S is sent, or even after the user process acknowledges its receipt. In RFCs 66 and 80, an ALL is expected on the connection to the server socket before data can be sent. In RFCs 123 and 127 the ALL requirement disappeared.