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As discussed in a previous post here, somewebsite.com is an example of a domain name.
However, as almost any Internet user would know, we normally access all websites via a web browser using an address like www.somewebsite.com.
Now, if somewebsite.com is a domain, what is www.somewebsite.com?
Well, technically, the www part in the example above is a subdomain. [...]

While those who are even slightly initiated in to the world of web technologies may feel that this is a moot question, there are many noobs who would not know what a domain name – or domain – is.
Citing an example would probably answer this question in very short order:
somesite.com is a domain. So are
anothersite.net [...]