The JUNOS software supports the Simple Network Management Protocol (SNMP), which helps administrators monitor the state of a router. The software supports SNMP version 1 (SNMPv1), version 2 (SNMPv2, also known as version 2c, or v2c), and version 3 (SNMPv3). The JUNOS implementation of SNMP does not include any of the security features that were originally included in the IETF SNMP drafts but were later dropped. The SNMP software is controlled by the JUNOS SNMP and Management Information Base II (MIB II) processes, which consist of an SNMP master agent and various subagents. For information about SNMP, see the JUNOS Network Management Configuration Guide.