# File lib/ldap/schema.rb, line 113
    def root_dse(attrs = nil, sec = 0, usec = 0)
      attrs ||= [
        'subschemaSubentry',
        'namingContexts',
        'monitorContext',
        'altServer',
        'supportedControl',
        'supportedExtension',
        'supportedFeatures',
        'supportedSASLMechanisms',
        'supportedLDAPVersion',
      ]

      entries = search2('', LDAP_SCOPE_BASE, '(objectClass=*)',
                        attrs, false, sec, usec)
      return entries
    end