RouterA will send a partial routing database when information from another interface modifies the database and when the Serial 0 interface comes up or goes down.

By default, routes are advertised by Routing Information Protocol (RIP) every 30 seconds, not just when the routing database is updated. However, you can configure RIP to send triggered advertisements by issuing the ip rip triggered command from interface configuration mode. The following events will trigger a partial database update:
- When the configured interface comes up or goes down
- When information from another interface modifies the routing table

The following events will trigger a full database update:
- When the router is first powered on
- When the router receives a specific request for a routing table update