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behaviour of SCNetworkCheckReachablityByName

Hi All,
In my application I will have to check at regular interval if a computer is connected to network or not. To implement this funtionality I was checking the behaviour of SCNetworkCheckReachablityByName.
Below is the code snippet:
 
SCNetworkConnectionFlags status;
BOOL result;
result=SCNetworkCheckReachabilityByName("XYZ",&status);
 
NSLog(@"Result= %d status=%d",result,status);
 
Output is always Result=1 status=0 whether "XYZ" computer is connected to network or not. If I include domain name computer name as follow:
 
 
SCNetworkConnectionFlags status;
BOOL result;
result=SCNetworkCheckReachabilityByName("XYZ.MyDomain.com",&status);
 
NSLog(@"Result= %d status=%d",result,status);
 
Then output is always "Result=1 status=2"  whether computer is connected to network or not.
Can someone explain this behaviour? Is that behaviour correct? Please also suggest if I'm using the right approach to check if a computer is connected to network or not.
 
Thanks,
Gurmit
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