Lately your IPv6 network has experienced problems connecting new clients to the network.
As part of your troubleshooting, you run an ipconfig command on one of the client computers
and find two IPv6 addresses reported on the Ethernet interface: fe80::894d:c173:fef2 and
fdb9::75f8:e30c:7cf4. Which one indicates the DHCPv6 server is probably working correctly? How
do you know?