Dual-stack means running IPv4 and IPv6 simultaneously. Each interface has both address types. Applications try IPv6 first, falling back to IPv4 if needed. Most modern operating systems prefer IPv6 when available. Your network infrastructure must route both protocols. This is the most common transition mechanism. Routers need IPv6-enabled routing protocols like OSPFv3 or MP-BGP.
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$ curl repovive.com/roadmaps/network-design/ip-addressing-and-subnetting/dual-stack-networks
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