In the OSPF Exstart state, which router is selected as the Master?

In the OSPF (Open Shortest Path First) protocol, the Master router in the Exstart state is elected based on router IDs, with the router that has the higher router ID being chosen as the Master. This selection process occurs after the initial Hello packet exchange during the OSPF adjacency formation. The reason for this is to establish a controlled communication sequence between the routers. The router acting as the Master has the responsibility to send data packets to the other router, which acts as the Slave.

This hierarchy, based on the router ID, helps manage the data exchange efficiency and maintain a structured communication channel in OSPF networks, which is essential for routing updates and maintaining accurate routing tables.