From the course: Networking Foundations: Networking Basics
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NAT overview
- Earlier, when we were discussing IPv4 and the IPv6, we mentioned that we're out of IPv4 addresses. This begs the question, how are we doing able to continue using IPv4 in our existing networks and even new networks? And a network service that makes that possible is called network addresses, translation, or NAT. Here's how it works. NAT allows us to have one set of IP addresses inside of our network and have those IP addresses translated into one or more IP addresses that can be routed on the public internet. Specifically with IPv4, there are some specific ranges of IP addresses that are designated for private use. That means we can use those addresses on the inside of our network, but we cannot use them on the public internet. However, if we translate those private addresses into the publicly ratable addresses, not only does that let us use a huge number of IP addresses on the inside of our networks and have those IP…
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