A network monitoring system uses SNMP polling to record the statistics of router interfaces. The SNMP queries work as expected until an engineer installs a new interface and reloads the router After t

An incorrect SNMP community string would prevent *all* SNMP queries from working from the initial setup, not specifically after a hardware change and reboot.

SNMP uses an `ifIndex` (interface index) to uniquely identify interfaces. When hardware changes, such as adding a new interface, or a device reboots, these `ifIndex` values can be dynamically re-assigned, breaking existing monitoring systems that relied on their prior static mappings.

Disabling SNMP server traps would prevent the router from sending unsolicited notifications, but it would not cause SNMP *queries* initiated by the monitoring system for interface statistics to fail.

Disabling traps for link state specifically would only affect notifications related to interface up/down status, not the ability to query general interface statistics via polling.