How often will LSU packets be sent to neighboring routers after an OSPF network converges and no topology change is detected?

In OSPF (Open Shortest Path First), Link State Update (LSU) packets are utilized to share routing information between neighboring routers. After the OSPF network has converged and no topology changes are detected, the frequency of these LSU packets is determined by the OSPF configuration settings.

The correct choice indicates that LSU packets will be sent every 30 minutes. This aligns with the default behavior of OSPF. Specifically, OSPF uses a keep-alive mechanism to maintain relationships with its neighbors, and it does this through periodic updates to ensure that all routers have consistent routing information. However, in a stable network scenario where no changes occur, the time interval for these updates is set to 30 minutes to optimize network performance and resource usage. This configuration reduces unnecessary traffic while still ensuring that all routers remain synchronized.

Understanding the timing of LSU packet transmissions is crucial for network stability and efficient routing table management. It also highlights OSPF's ability to dynamically adjust to changes while maintaining a balance of communication frequency under stable conditions.