1 Network Intro (7.13 MB) 1 OSI to TCPIP Mapping (6.04 MB) 2 Physical Layer 1 Wired Topology (11.2 MB) 3 Physical Layer 1 Wireless Systems (10.37 MB) 4 Data Link Layer 2 Systems and Protocols (7.69 MB) 5 Network Layer 3 Systems and Protocols (7.83 MB) 6 Transport Layer 4 Systems and Protocols (6.69 MB) 7 Presentation and Session Layer 5 and 6 Systems and Protocols (7.37 MB) 8 Application Layer 7 Systems and Protocols (11.85 MB) 1 Fundamental Switch Functions (6.06 MB) 2 Fundamental Router Function (7.22 MB) 3 Fundamental Firewall Function (7.01 MB) 4 Software Defined Network (7.82 MB) 5 Supervisory Control and Data Acquisition (2.96 MB) 1 Layer 1 Threats and Countermeasures Wireless (10.81 MB) 2 Layer 2 Threats and Countermeasures (7.58 MB) 3 Layer 3 Threats and Countermeasures (6.84 MB) 4 Layer 4 Threats and Countermeasures (6.81 MB) 5 Layers 5 Threats and Countermeasures (10.44 MB) 1 Network Summary (50.01 MB)