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Lesson 2 of 3~1 min read67% complete
Network Security Fundamentals
Network Security
The OSI Model
| Layer | Name | Example |
|---|---|---|
| 7 | Application | HTTP, DNS |
| 4 | Transport | TCP, UDP |
| 3 | Network | IP, routing |
| 1 | Physical | Cables, wireless |
Key Measures
- Firewalls: Filter traffic
- VPN: Encrypt internet traffic
- IDS/IPS: Detect and prevent intrusions
- Network Segmentation: Isolate zones