What is a URL ? O'reilly publisher "Networks is a very simple concept known only to a few"
A url is divided up into three parts. HEAD : IP ADDRESS OF ORIGIN and DESTINATION BODY : contains Index.html from tomcat TAIL : CHECKSUM for developers to check the sum total number of bytes are same as in the body. Check if no bytes got lost on the way. TOR : when a user's URL travels through TOR network the origin ip address is extracted from URL and its ip address replaced instead. Then on the way back ip address is then placed back with users ip address so it can find it's way home. This system of SecureByDesign is so effective as consumer protection , that Facebook has moved its servers inside the TOR so as to quicken the network traffic travelling through TOR. Although they know they have exposed their server IP address to TOR. But they dont mind that. Obviously if you are dumb enough to login via a pop box or html form then the whole idea of using TOR is negated. SSL will encrypt and decrypt via its own dedicated port.
