I am using Windows XP SP3 with Oracle VirtualBox installed in it. I am running Fedora 15 as a guest OS. Now my Internet Service Provider provides the internet connection on basis of MAC address locking which basically means that if the MAC address of my computer changes then I will not be able to connect to the internet. My query is that how does virtual box connect to the internet from inside a guest OS? I have already seen the creation of another network in my computer ie. Virtual Box Host Only Network--What is this ? Again when I run ipconfig from the command prompt I get two different networks with two different MAC addresses. Now how come Virtual Box connects under this connection called Virtual Box Host Only Network ie. connects under a different MAC address and yet my ISP does not allow connection under a different MAC address? Does it map the MAC address of one network to the original MAC address or is it something else? Basically I want to know how all Virtual Box connects to the internet? Thank You.