Can someone help me translate the NTP startup message . What is a socket boundry? Max Descriptors? Is this normal? Thanks!

Sep 25 09:58:06 server1a ntpdate[5174]: step time server 10.2.0.9 offset -0.013202 sec
Sep 25 09:58:06 server1a ntpd[5176]: ntpd 4.2.2p1@1.1570 Wed Nov 29 15:16:26 UTC 2006 (1)
Sep 25 09:58:06 server1a ntpd[5177]: precision = 1.000 usec
Sep 25 09:58:06 server1a ntpd[5177]: ntp_io: estimated max descriptors: 1024, initial socket boundary: 16