Today I searched how to diagnose an internet connectivity issue to a specific web site. It was about 1am and I got awakened by a call from our office in India. They were having problems connecting to our web based system. They said they could get to any other site but ours. I checked our site from my computer at home and found everything working properly. It was one of the hops in between causing a connectivity issue.
I started to google and found this pretty cool trace tool VisualRoute 2010 Lite Edition. The lite edition is free and allows you to run a trace route back to any domain on the net. It will show you the number of hops and response time. It also was able to tell me what network the bad hop resided in and its ip address. The pay additions look like they are much for feature rich but this was a nice graphical free tool I was able to use to quickly diagnose the problem.