Does Junos OS support the view-based access control model (VACM)?
Yes, Junos OS supports VACM as part of its support for SNMPv3. SNMPv3 contains more security measures than previous versions of SNMP, including providing a defined VACM. SNMPv3 VACM determines whether a specific type of access (read or write) to the management information is allowed.
For more information, click Understanding SNMP implementation in Junos OS.