Explore WAN architectures in this comprehensive video lecture from the CCNA 200-301 course. Dive into various technologies including leased lines, MPLS, and Internet VPNs with IPsec and TLS. Learn about different types of internet connections such as DSL and cable, and understand the concepts of redundant internet connections. Discover the differences between site-to-site and remote-access VPNs, and gain insights into GRE over IPsec and DMVPN. Test your knowledge with multiple quizzes throughout the lecture and prepare for your CCNA certification with practical information on Boson ExSim practice exams.