30D-Link DHP-W221AV User Manual
Section 3 - Conguration
System Check
This page helps you to diagnose connection problems. 
Ping Test:
Ping Result:
A ping test sends a tiny bit of information to a website and 
anticipates a response. Pinging an extremely stable site such 
as your favorite search engine or news site can help tell you if 
your Internet connection is working properly. If you can ping 
a site or address from here but your computer is getting no 
connectivity, then the DHP-W220AV is working properly but 
there is the problem with the computer.
“Ping timeout” means that the site did not respond. This 
happens if the site is down or does not exist, but also if you 
do not have Internet connectivity. If you ping several common 
websites and all result in a timeout then there is likely an issue 
with your Internet connection. If the result says a site is alive, 
then your Internet connection is working.