Everyone knows that DNS is used to translate hostnames to IP addresses, but do you know that DNS can also be used to retrieve the domain name when the IP address is known?

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When you sign up for a Gmail account from Google, you actually get a couple of e-mail addresses and aliases.

The User Agent, well the HTTP User Agent, is a string of data identifying the browser, browser version, the underlying Operating System and contains other miscellaneous information.

A CGI proxy is a HTTP/FTP proxy that allows a user to access a different site through it. It is most commonly used when a user is not able to access the site directly or just that the user wants to access the site anonymously.

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