The following pairin LdapSarver groupweaving modelWhich statement is correct?

The root of the Ldap Server directory tree generally defines the domain name the C?cin Compnitment

Ldap Server directory information is organized and stored based on a tree structure.

Each node in the Ldap Server directory tree is called an entry, and I have its own uniquely distinguishable name? ?(Plantnad? ?)

Specific objects cannot be defined under organizational units.