Dive into the intricacies of Open Shortest Path First (OSPF) in this comprehensive video tutorial, part of a complete CCNA 200-301 course. Explore OSPF cost calculation, including how to change the reference bandwidth, and gain a thorough understanding of OSPF neighbor states from Down to Full. Learn about OSPF message types, essential 'show' commands, and advanced configuration techniques. Test your knowledge with five quizzes throughout the lesson, and get introduced to the Boson ExSim practice exam tool. Perfect for aspiring network professionals preparing for the CCNA certification or those looking to deepen their understanding of this crucial link-state routing protocol.