It is a problem for anyone who cares about DNS and/or security. Maybe your professor doesn't belong to either group
Like regardless of if you think they were right about that decision or not, the fact is that through chrome and google search google controls traffic to enough of the web that it’s hard to stand up to them. They’ve done it before & they can do it again
@DialMforMara hmm, i never thought about it like that, but I guess you're right- there is a public misconception about the meaning of subdomains!
In Google's opinion, the www. subdomain is "optional" or "implied", which is why this whole thing is happening, apparently.
Well, as the domain owner / DNS operator you can configure your DNS to respond in anyway you please. "www" is just a subdomain like every other.
The better question is: why did we ever start to prefix websites with a subdomain "www", when the service is already differentiated by the TCP port.
Legacy reasons I guess, the web was always an afterthought (and hence running on a separate server with its own IP) and not the primary goal of the Internet.
More than you would think. You don't usually see them, since they are mostly implied by the program you use, but here are a few examples:
ftp:// irc:// gopher:// smtp:// imap:// ...
There are literally thousands of established protocols, which are all based on TCP or UDP, but the average user will only ever hear about http and maybe ftp.
@DialMforMara are you asking why both versions (with www. and without) are "allowed" to map to different locations? if so, i like barely know this from a class i'm in right now, but basically people came up with all this stuff when the concept of networks, much less the internet, were known only to a few! so they didn't necessarily know that so many domains would use the www. subdomain
@DialMforMara i don't really know about "originally" (or your other question- I'VE BEEN IN NETWORKING CLASS FOR 3 WEEKS SORRY AAA. but my professor casually said he used to own the domain for purdue.edu (my school)- he just had it first! eventually the school people came to his office and negotiated with him
Cybrespace is an instance of Mastodon, a social network based on open web protocols and free, open-source software. It is decentralized like e-mail.