Današnja pitanja i odgovori nam se javljaju zahvaljujući SuperUseru - podjele Stack Exchange-a, zajednice-driven grupiranja Q & A web stranica.
Fotografija ljubaznošću Cory M. Grenier (Flickr).
Pitanje
SuperUser čitač Joseph A. želi znati kako web poslužitelji mogu reći ako koristite izravnu IP adresu ili ne:
Some web servers, when accessed using their IP address, return an error that direct IP address access is not allowed. I have been wondering for some time how this works.
Does a browser always resolve the IP address and connect to it? Direct IP address access is just skipping DNS altogether, right? How does a remote server even know that you skipped DNS?
Kako web-poslužitelji znaju upotrebljavate li izravnu IP adresu ili ne?
Odgovor
SuperUser suradnik iAdjunct ima odgovor za nas:
To answer your question of how it knows, it has to do with what your browser sends the web server. You are right that the system always resolves it to an IP address, but the browser sends the URL you attempted to access in the HTTP header.
Here is a sample header that I found online, modified to look as though you used Firefox on Windows and typed apple.com into the address bar:
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