Have you ever sat at the airport or at a cafe and there was clearly a unencrypted wifi access level nearby, but once you wanted to see a web site their internet site would pop-up asking to get a fee to make an online search through their particular AccessPoint (otherwise known as. Captive Site)?
Properly, I would, several instances. But typically it is possible to look upwards arbitrary hostnames, for instance. google.com. That is because if you cannot resolve a host name your browser won’t display any site. So these providers usually allow to look up hostnames to then filter whether they are allowed to access the site or not. In the latter case, their pay-to-get-access site pops up.
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