Which is an advantage of using SNMP v3 instead of SNMP v1/v2 when querying a FortiGate unit?

MIB-based report uploads are a function of the reporting or management system, not a specific security or protocol advantage inherent to SNMPv3 over v1/v2c.

SNMP access can be limited by access lists on the FortiGate for all versions (v1, v2c, and v3), so this is not an exclusive advantage of SNMPv3.

SNMPv3 introduces robust security features including packet encryption, ensuring the confidentiality of data exchanged between the FortiGate and the SNMP manager, as well as authentication and integrity checks, which are absent in earlier versions.

The ability to run an SNMP service on a non-standard port is generally a configuration option for the SNMP agent itself and is not a unique security or feature advantage of SNMPv3.