What is ping? and what is it for?
A basic Internet program that lets you verify that a particular Internet address exists and can accept requests. The act of using the ping utility or command. Pinging is diagnostically used to ensure that a host computer, which you are trying to reach, actually operates.
Please go to http://www.kitterman.com/spf/validate.html
Web information is stored in documents called web pages. Web pages are files...
WHOIS (pronounced as the phrase who is) is a query/response protocol that is widely used for...
The Web is a network of computers all over the world. All the computers in the Web...
Please go to this link : http://www.robtex.com/dns/