IT Communications Progress Test 1 Practice

The main idea here is to use IPv6 alongside IPv4 so you can take advantage of a much larger address space while keeping IPv4 working during the transition. Running a dual-stack environment means devices obtain both an IPv4 address and an IPv6 address. That expands how you assign addresses for new devices and services, which eases pressure on the limited IPv4 pool. With IPv6, devices can be reached directly using globally routable addresses, reducing the need to rely on NAT to stretch IPv4 addresses. This approach supports gradual migration: you continue to support existing IPv4-based systems while you deploy IPv6, avoiding sudden cuts or compatibility problems. It’s not about using NAT for IPv6 (that’s not standard practice and runs against IPv6 design goals); it’s about enabling direct IPv6 connectivity where possible and preserving IPv4 for legacy traffic. The other options would either drop compatibility (IPv6-only with no dual-stack) or strip away IPv4 support too early, or rely on NAT for IPv6, which isn’t aligned with how IPv6 is meant to operate.