CGNAT FAQ – IPv4 Conservation and IPv6 Migration
By contrast, IPv6 addresses are in a 128 bit format. This allows for 340 undecillion numbers. How many is that? It’s 340 followed by 36 zeros. That’s enough to give an IP address to every atom on the surface of the earth and still have enough left over for 100 more earths.
Also, networks often require different transition technologies to be deployed simultaneously. These solutions allow you to deploy each transition technology concurrently. For example, you could start with CGNAT to immediately mitigate IPv4 address exhaustion, and then phase in NAT64/DNS64 to enable IPv6 clients to access the IPv4 Internet when you are ready.
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