Some applications may rely on NIS maps. Will they still function the same way with NIS+, and can they function correctly in a mixed environment?
If you want to use NIS+ to support your custom NIS maps, you should create a key-value table, a table with two columns. The first column is the key and the second column is the value. If you then run the NIS+ servers in NIS-compatibility mode, the NIS clients will not notice any change in functionality.