When will an OSPF-enabled router transition from the Down state to the Init state?
- when the router receives a hello packet from a neighbor router
- when an OSPF-enabled interface starts sending hello packets
- as soon as the router starts
- as soon as the DR/BDR election process is complete
| Explanation & Hint:
An OSPF-enabled router transitions from the Down state to the Init state when the router receives a hello packet from a neighbor router. In the Down state, the OSPF process is inactive on the interface, and it transitions to the Init state when the router detects a neighbor (by receiving a Hello packet on that interface). This indicates that there is at least one OSPF router in the network reachable via that interface. The Init state is the beginning of the OSPF neighbor formation process. |