On Monday, February 23, 2004, at 03:33 PM, David R. wrote:
Unfortunately it doesn't work the same as in OS9, as it only provides a
manual sync with Network Time button. I guess it might work if the computer
was always connected to dsl or cable but as you know that's not possible
with dialup. Seems Apple didn't consider that not everybody has dsl in this
world when they wrote X. I checked VersionTracker and there doesn't seem to
be a third party software fix, there at least.
Being a BSD/Linux adolescent (more than a newbie, less than script capable), network time is merely a working out of the NTP protocol, a well defined way that the UNIX boxen of old could get the system clocks corrected. Often, this was done via a daily or even hourly cron job. All the NTP request is is a telnet packet on a specified port (23, IIRC) and the requested machine returns date and UTC time. The requestor then factors in +/- from UTC (in a .conf file somewhere) and the system clock is set. Life is beautiful.
What I understand about newer *NIXish systems is that NTP is not limited to a pre-determined schedule a la cron jobs. If the NTP client daemon is running, random packets are sent looking for a response. IOW, the Classic way of every 24 hrs is no longer necessary. The system clock is repeatedly set in OS X if Network Time is turned on.
My guess (emphasis on "guess") is that the NTP daemon has a means to determine if a connection is active before opening a port thereby leaving a modem connected machine idle. Only if the connection flag bit is flipped will an actual packet be pushed. In Classic, if the pref for initiate a connection when asked was selected, my machine would have dialed out simply to check the time. I don't think that needs to be worried about in X, although I'm on a cable modem so I can't tell.
Pax,
Pastor Mac On OS X
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