Which of the following information about the InfoEqualizer function of Huawei OceanStor 9000 is correct? (Multiple choice)

Which of the following information about the InfoEqualizer function of Huawei OceanStor 9000 is correct? (Multiple choice)
A . When using the InfoEqualizer function, you need to configure DN
B . If you use an external DNS server, when configuring the DNS server, there is a setting of "reverse lookup zone name", network ID setting in this tab, you need to input network ID in reverseorder.
C . When there is a DNS server in the user network, the DNS server in the user network does not need to configure the forwarding record. When the user network without DNS service server, configure the InfoEqualizer DNS IP address as the DNS server’saddress on the client.
D . The root domain name is the domain name InfoEqualizer configured for the cluster. This domain name must be configured as the fully qualified domain name, that is, the domain name that includes the root node.
E . The domain name ofthe partition is configured as the relative domain name, and the root domain name of the InfoEqualizer is automatically taken as the suffix of the domain name, and the full name of the domain name is formed with maximum support of 32 partitions.

Answer: B,C,D