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Traditionally, when a home user sets up a home network, a lot of manual configuration is needed. While the IPv6 configuration can be done in an automated way by using Prefix Delegation, the IPv4 setup requires manual configuration of subnets and routes within the network. The mechanism of Link-ID describes a way to derive IPv4 subnets from the IPv6 subnet, so manual configuration of the first is no longer needed.
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Today, Network Address Translators (or NAT) devices are everywhere. Their rapid rise towards universal adoption was not part of a planned effort. Instead, it was fueled by the continued growth of the internet and the corresponding depletion of the IPv4 address space. Besides obvious advantages, such as IP address reuse and hiding of internal network topologies, NAT technology has some important drawbacks as well. This blog post takes a closer look at these downsides.
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