"rajasen d", you have previously been warned on one or more occasions regarding adjusting your display name to meet JavaRanch standards. This is not optional. Please take a look at the JavaRanch Naming Policy and adjust your display name to match it prior to your next post.
Be aware that accounts with invalid display names are removed.
One of the reasons you might not be seeing the answers you expect is that you still ignore the naming rule. This community has very few rules, but the naming policy is one we take serious. If you don't follow it, people might not react the same way they might if you did otherwise. Please change your display name prior to your next post.
Ping & DNS - updated with new look and Ping home screen widget