> On Nov 11, 2014, at 9:59 AM, Quinn The Eskimo! <eski...@apple.com> wrote: > > o reachability saying "no" doesn't guarantee that the connection will fail
Can you elaborate on that? It's the part I don't understand. As I said above, I thought that a "no" meant the IP routing tables were telling me "you can't get there from here." In what cases would there be a false negative? (…other than race conditions where the host becomes reachable right after I make the call. I'm using the observation mode so I get notified when reachability changes.) One of the reasons I don't want to try first is that the attempt might take a long time to fail due to DNS timeouts or whatever. It's a better user experience if I immediately tell the API client (and thus the user) "you're offline", rather than attempting to connect for 30 seconds before giving up. —Jens
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