What You've Learned Directory services allow multiple processes to access common system data, such as user information. Data can be stored on a network server, allowing multiple computers to access the same data. With proper configuration, the same user account can be used to log into multiple computers on the network, rather than tying the user to a single computer. User records are the most frequently used record type and store information to uniquely identify a user. Group records define one or more users that should share certain system permissions. If a replica is separated from all other replicas by a slow network link and that replica fails, clients of the replica will fail over to a replica on the other side of the slow network link. You can increase the size of the BerkeleyDB cache to improve performance of the database. The Kerberos KDC uses TCP/UDP port 88; TCP/UDP port 749 is used for Kerberos administration.
References Administration Guides "Mac OS X Open Directory Administration": http://images.apple.com/server/pdfs/Open_Directory_v10.4.pdf "Mac OS X Server Command-Line Administration": http://images.apple.com/server/pdfs/Command_Line_v10.4.pdf |