The two features of the IPv6 protocol are:
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Autoconfiguration - IPv6 supports stateless address autoconfiguration (SLAAC), allowing devices to automatically configure their own IP addresses without the need for a DHCP server.
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No broadcasts - IPv6 does not use broadcast communication like IPv4 does. Instead, it utilizes multicast and anycast to efficiently manage communication between devices.
The other options, "checksums" and "complicated header," are not features of IPv6, as IPv6 does not include a checksum in its header (unlike IPv4) and has been designed to simplify the header structure rather than complicate it.