On Jan 26, 2005, at 16:01, Clark Martin wrote:AFAIK there is no AppleTalk over IP in OS X.
I don't know enough to contradict this statement, but I wonder if it is true. OS X-to-OS X is likely using Rendezvous and AFP. As I said, my System 7 box can connect to my OS X box if I use the "Server IP address" button when the AppleTalk checkbox is unchecked in OS X. Isn't that AppleTalk over IP?
A little bit of Googling and I found my answer. OS X uses AFP-over-TCP, and advertises itself with Rendezvous. Very cool. So, I get it now, the AppleTalk checkbox turns on AppleTalk for that interface. But I still don't understand why only one interface can run AppleTalk at a time.
If you configure an interface for using IP and you check the AT box you are configuring it to use IP and AT, not IP over AT nor AT over IP. They are two distinct network protocols having nothing to do with each other normally.
OK, so checking the box configures it to use AppleTalk over the selected interface - that is, AppleTalk over Ethernet or AppleTalk over wireless or whatever. No problem. Makes sense.
What makes me wonder is, like I said, my System 7 clients can still connect regardless of whether that box is checked. It's just that if I don't check the box I have to specify the IP address in Chooser, but if the box is checked Chooser sees my OS X box. If the box is unchecked and I specify the IP address in Chooser, I guess I'm using AppleTalk/IP correct?
Put another way: if AppleTalk isn't active on a server, yet I can still contact that server (via IP address), how is it working? :)
Still wondering about this one, but my gut tells me that it's AppleTalk/IP.
AppleTalk and IP sit at equal levels in the networking hierarchy. They are two distinct ways of doing things. But since AppleTalk has a simpler configuration and is being phased out to boot it gets fairly minimal listing in the Network preference pane.
Sure, now that we have Rendezvous and AFP-over-TCP, it totally makes sense.
Also, others might find "Rendezvous Browser" (http://www.tildesoft.com/Programs.html) interesting. There sure are a lot of protocols that advertise with Rendezvous/Zeroconf!
Eagle
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