Well your browser is using version 1.1 or later of the HTTP protocol, and one of the features of HTTP/1.1 is virtual hosting.

You get an error rather than the Microsoft site. If you were to monitor your network traffic, you would see communication between your machine and the addresses above.Д«ut what if you put into the browser instead? ItвЂ™s the same address, so it should display the same content right? Well, noвЂ¦ Your browser will then show the Microsoft website. So if you open up a browser, and put in your browser will look up the IP addresses, choose one of the 6 available, connect to it and request the page. If you perform a DNS lookup of you typically see 6 IP addresses, as below:

LetвЂ™s take the Microsoft website as an example. The reason being that some protocols, most notably HTTP behave differently depending on how you address them. The traditional approach to a vulnerability scan or penetration test is to find the IP addresses that you want tested, throw them in and kick things off.Д«ut doing a test based purely on IP addresses is a BAD IDEAВ and can often MISS THINGS.

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