Remember these Terms

• OSPF: Link-state routing protocol for IP networks.
• Router ID (RID): Unique 32-bit identifier for a router.
• Hello packet: Discovers neighbors and maintains relationships.
• Adjacency: Full neighbor relationship used to exchange LSAs.
• LSA: Link-State Advertisement describing network topology.
• LSDB: Database of LSAs shared within an area.
• Area: Logical group of routers; Area 0 is backbone.
• DR/BDR: Elected on multiaccess networks to reduce updates.
• Cost: OSPF metric; lower cost is preferred.
• SPF: Dijkstra algorithm computing shortest paths from LSDB.