Module 06: Network Security
📅 Date Started: 2026-05-09
📅 Date Completed: 2026-05-10
🎯 What I Learned:
- Network security threats: Network attacks, application and service attacks, and wireless attack vectors
- Network security devices: Firewalls, routers, network switches, proxy servers, load balancers, and hardware security modules (HSM)
- Network security architecture: Network design principles, DMZ (demilitarized zone), NAT (network address translation), honeypots, network segmentation, extranet, and air gap configurations
- Network access control: Authentication, authorization, identification, and accounting (AAA) frameworks
- Access control mechanisms: Additional authentication methods, access control schemes, and filesystem permissions
- Practical application: Designing secure network architectures with layered defense strategies
💡 Key Takeaways:
- Network security requires a defense-in-depth approach using multiple complementary controls
- Security devices serve different purposes: firewalls filter traffic, proxies provide anonymity and caching, load balancers distribute traffic, and HSMs protect cryptographic keys
- Network architecture decisions directly impact security posture: segmentation limits lateral movement, DMZs isolate public-facing services, and air gaps provide physical isolation
- The AAA framework (authentication, authorization, accounting) is fundamental to controlling network access
- Understanding both threats and protective measures is essential for designing resilient network infrastructures
🔗 Links/Resources:
📸 Screenshots:
(Module 06 completion)