Network Address Ping Tool
Ping a server to find out if it's online or not.
Ping utility sends ICMP packets to the destination address and gives an outside view of your server's response time, which allows you to track down any possible problem.
To check if a computer is on the internet, enter the IP address of that computer into the box above and press enter, the ping utility will send 5 ICMP packets to the computer and will show the results. The ping utility will not work if a firewall blocks ICMP packets.
More information on Ping can be found on wikipedia article here.