Use of SNMPv1 and SNMPv2 are Not Recommended

Using SNMPv1 and SNMPv2 are not recommended because they authenticate using unencrypted, plaintext community strings.

Using SNMPv3 is recommended for access to the SNMP agent, as well as to SNMP traps. SNMPv3 authenticates using encrypted community strings. For more information, refer to Use SNMP.