IPv4 supports four different classes of addresses, which are Anycast, Broadcast, Multicast, and Unicast. While the term Anycast has not been used in previous modules in this guide, it is important to remember that Anycast addresses are not special types of addresses. Instead, an Anycast address is simply an IP address that is assigned to multiple interfaces. Common examples of technologies that use Anycast addressing include IP Multicast implementations and 6to4 relay implementation.
NOTE: 6to4 is a transition mechanism for migrating from IPv4 to IPv6. For the CCNA exam, you only need to know that it exists.
With Anycast addressing . . .
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