3. PPP Authentication

Learn how to secure your WAN links with PPP Authentication — a must-know topic for the CCNA exam! In this video, you'll learn: - Why PPP authentication is essential for secure WAN connections - The two PPP authentication protocols: PAP and CHAP - How PAP works — two-way handshake, plaintext password exchange - How CHAP works — three-way handshake, MD5 challenge-response - PAP vs CHAP: key differences and when to use each - Step-by-step configuration of PAP and CHAP on Cisco routers - How to verify and troubleshoot PPP authentication Understanding PPP authentication is critical for both real-world network security and passing the CCNA exam. This video walks you through everything with clear explanations and live Cisco demos. #systemengineer7131 #CCNA #CiscoNetworking #WAN #NetworkingTutorial #CCNABoost #CiscoRouter #CCNA2026