this post was submitted on 17 May 2024
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Dynamic IPs were primarily a way to get around a limited pool of IP addresses. That's all. Local IP addresses (think 192.168.x.x) were created for the same reason.
The NAT your home internet modem uses in providing your local network IP does provide a hard firewall between your computer and the internet, but that is more a side effect of the technology than anything else.