Every website needs a unique identification. ,com was used for commercial websites, .edu was for educational institutions, .in identifies that the site is promoted in India, .org implies it is a organisation like a social service organisation, govt. body etc. The entire web space structure is similar to that of an inverted tree which is a Unix structure. There is a single top level domain called root domain which is ".", under this root domain there are other top level domains like .com, .co. in .org etc. Top level domain is the part of an internet address between the last and the end of the address, excluding the path/address of a specific page if present. TLDs include .com, .org, .net, and all the national domains such as .uk for the UK and .fr for France. This entire structure is same as that of Windows file system where a drive like D: is located (can be considered as a Top level domain), under which other folders and files are created, to reach a file under D: we have to follow a ...more