Duration 43 Hours 6 Courses Cisco CCIE RS Core Concepts - Network Principles Duration : 5 H 37 M Cisco CCIE RS Core Concepts - Layer 2 Technologies Duration : 5 H 7 M Cisco CCIE RS Core Concepts - Layer 3 Technologies Duration : 20 H 25 M Cisco CCIE RS Core Concepts - VPN Technologies Duration : 6 H 42 M Cisco CCIE RS Core Concepts - Infrastructure Security Duration : 2 H 36 M Cisco CCIE RS Core Concepts - Infrastructure Services Duration : 2 H 47 M