-Send \fInum_requests_in_parallel\fP. By default, radclient sends the
-first request listed in a file, waits for the response, and then sends
-the second request. This option allows you to send many requests all
-at once.
+Send \fInum_requests_in_parallel\fP, without waiting for a response
+for each one. By default, radclient sends the first request listed in
+a file, waits for the response, and once the response is received,
+sends the second request. This option allows you to send many
+requests at a time. Once \fInum_requests_in_parallel\fP are sent,
+radclient waits for all of the responses to arrive (or for the
+requests to time out), before sending any more packets.