This illustration shows load balancing in a rack-mounted directory server configuration. It shows two LDAP clients logging in to an unspecified number of Oracle Internet Directory nodes over the Internet. A load balancer routes them to an unspecified number of Oracle Internet Directory nodes. The first node is Node A containing OID Monitor, a directory server, and directory replication server, and a directory integration server. To the right of Node A is node B containing an OID Monitor, a directory server and a directory integration server. To the right of Node B is an ellipsis indicating an unspecified number of other nodes. To the right of this ellipsis is Node N containing OID Monitor, a directory server,and a directory integration server. These nodes connect to an Oracle9i Database Server by way of a network layer.