Hi, I am currently learning about networking. My current understanding is that any isolated network that implements the internet protocol can connect to another network that is already in the internet, and become part of the internet. Now, how is one prevented or discouraged from using an already existing IP address (either accidentally or purposefully) for their network? In other words, how do people prevent duplicate IP addresses from appearing in the internet network? I have googled this online and haven't found a clear answer on the prevention part. I have learned there is a non-profit organization called IANA that manages allocation to regional registries, which in turn allocate to ISPs and orgs. But are there laws in place to prevent duplicate IP networks from connecting to the internet?
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