How to Ping or check if server of particular IP Address is available/connected in iPhone

Question

I want to Ping or Lookup a particular IP address of server if it is connected or available at that particular time or not in my iPhone application.

I searched a lot

Answer 1

You need Apple's Reachability Sample Application.

Answer 2

If you want to ping the server, try this:

SimplePing

It allows for you to ping by either hostname or IP.

Answer 3

Apple provides reachability classes you can use the class and

You can download reachability.h and Reachability.m

And use this as

Reachability* reachability = [[Reachability reachabilityWithHostName: @"www.apple.com"] retain];
NetworkStatus netStatus = [reachability currentReachabilityStatus];

netStatus gives the reachabilty of the server.