Networking
Core communication and infrastructure skills.
A visual mental model for Networking. Rotate, zoom and inspect the relationships between the major components.
Networking is a professional cybersecurity capability area. It combines the concepts, operational workflows, evidence sources and defensive controls used to understand, secure, monitor or investigate systems.
Study Networking from fundamentals to practical analysis. Learn what normal behavior looks like, how the technology is deployed, what evidence it produces, how failures are diagnosed, and how defenders reduce risk. Use the tools only on systems and traffic you are authorized to inspect.
Define Networking; explain the main technologies; recognize normal versus suspicious behavior; perform safe lab exercises; interpret evidence; troubleshoot common failures; document findings and defensive recommendations.
TCP/IP | OSI Model | DNS | DHCP | HTTP/HTTPS | FTP | SSH | VPN | VLAN | Routing | Switching
Common security concerns include misconfiguration, credential abuse, unauthorized access, spoofing, data exposure, evasion, service disruption and lateral movement. Focus on prevention, detection and response in authorized environments.
Start by defining the symptom and scope. Check configuration and dependencies, validate logs/telemetry, reproduce safely in a lab, isolate the failing layer or component, change one variable at a time, and document the result.
Wireshark | Cisco Packet Tracer | GNS3 | Nmap
Open full study notes
# Networking ## Core skills - TCP/IP - OSI Model - DNS - DHCP - HTTP/HTTPS - FTP - SSH - VPN - VLAN - Routing - Switching ## Tools - Wireshark - Cisco Packet Tracer - GNS3 - Nmap ## Study approach Understand the architecture first, then practice observation and defensive troubleshooting in a controlled lab. Record commands, evidence, assumptions and conclusions.