Details. In practice, few applications do interesting things when binding to multiple IP addresses. It’s like a special case of single IP address. Perhaps I sh

Details. In practice, few applications do interesting things when binding to multiple IP addresses. It’s like a special case of single IP address. Perhaps I should phrase it, there is no fundamental reason why IP addresses are associated with hosts rather than users, or even services. There is no fundamental reason why you need to be root to listen to privileged ports, which includes many of the most useful ports.