624 Red Hat Directory Server Plug-in Programmer’s Guide • May 2005Simple Network Management Protocol See SNMP.single-master replication The most basic replication scenario in which twoservers each hold a copy of the same read-write replicas to consumer servers. In asingle-master replication scenario, the supplier server maintains a changelog.SIR See supplier-initiated replication.slapd LDAP Directory Server daemon or service that is responsible for mostfunctions of a directory except replication. See also ns-slapd.SNMP Also Simple Network Management Protocol. Used to monitor and manageapplication processes running on the servers by exchanging data about networkactivity.SNMP master agent Software that exchanges information between the varioussubagents and the NMS.SNMP subagent Software that gathers information about the managed deviceand passes the information to the master agent. Also subagent.SSL Also Secure Sockets Layer. A software library establishing a secureconnection between two parties (client and server) used to implement HTTPS, thesecure version of HTTP.standard index index maintained by default.sub suffix A branch underneath a root suffix.subagent See SNMP subagent.substring index Allows for efficient searching against substrings within entries.Substring indexes are limited to a minimum of two characters for each entry.suffix The name of the entry at the top of the directory tree, below which data isstored. Multiple suffixes are possible within the same directory. Each databaseonly has one suffix.superuser The most privileged user available on Unix machines. The superuserhas complete access privileges to all files on the machine. Also called root.supplier Server containing the master copy of directory trees or subtrees thatare replicated to consumer servers.