When i check reachability of particular address it is always returning YES, irrespective to the current status

[syamalach]

I am checking reachibilty as below

GCNetworkReachability *reachability = [GCNetworkReachability reachabilityWithInternetAddressString:@"172.16.1.1"];
bool isReachable=[reachability isReachable];
if(isReachable)
NSLog(@"YES");
else
NSLog(@"NO");
It always returns YES, even if i am unable to ping to that ip