正解:D
Looking at the configuration, it seems that there are two SNMP community strings configured,
"public" and "private". However, the configuration does not specify which community string is
being used by the host with IP address 10.1.1.1.
The correct action to resolve this issue would be to configure a valid SNMP community string on
the device from which the SNMP request is being made, and ensure that it matches the
community string configured on the router.