In this lesson we take a look at the OSPF Neighbor Adjacency States: DOWN, ATTEMPT, INIT, 2-WAY, EXSTART, EXCHANGE, LOADING, and FULL. We're going to step through each of them and explain exactly what triggers each state, what happens within each state, and the functionality each state provides. Highly recommend watching the video on Hello Packets prior to watching this video: This is Lesson 4 of the Practical OSPF series: 00:00 - Introduction 00:36 - Neighbor ID & Neighbors Field 01:06 - OSPF Down State 03:05 - OSPF Attempt State 04:05 - OSPF Down State (Continuation) 05:20 - OSPF Init State 05:55 - OSPF 2-Way State 06:53 - Down Init 2-Way vs Down 2-Way 07:10 - Continuing past 2-Way State 07:52 - OSPF ExStart State & Master / Slave Election 09:36 - OSPF ExChange State & LSDB Summary Exchange 10:17 - Reliable DBD Exchange and Master Slave Election 11:17 - OSPF Loading State 12:51 - OSPF Full State 13:17 - Summary / Next Lesson 💬 Join us on Discord: 📜 More free CCNA resources: #ospf #ccna #neighbors