ML SystemPart 1: Core ConceptsChapter 1
CH.01 ~20 min
Network Security Foundations
OSI model, TCP/IP, and basic network infrastructure.
OSI ModelTCP/IPDNSSubnetting
- Understand the 7 layers of the OSI model.
- Explain the roles of IP, DNS, and DHCP in networking.
- Understand the concepts of network segmentation and DMZ.
01 Basic Knowledge Architecture: IT Infrastructure and Networking Viz
Core Foundation
This learning roadmap breaks down the skill acquisition trajectory into several fundamental phases, specifically designed to bridge the gap between basic computer science theory and real-world cybersecurity operations.
02 OSI and TCP/IP Model
| OSI Model Layer | Primary Function | Attack Vector Examples |
|---|---|---|
| L1: Physical | Transmission of raw bits over physical media. | Hardware wiretapping, wireless jamming. |
| L2: Data Link | Physical addressing (MAC) and data transfer between nodes. | ARP Spoofing, MAC Flooding, VLAN Hopping. |
| L3: Network | Logical addressing (IP) and packet routing. | IP Spoofing, routing manipulation. |
| L4: Transport | End-to-end transmission (TCP/UDP). | SYN Flood (DDoS), TCP session hijacking. |
| L5: Session | Maintaining and managing communication sessions. | Session Hijacking, Man-in-the-Middle. |
| L6: Presentation | Data translation, encryption, and compression. | Cryptographic exploitation, downgrade attacks. |
| L7: Application | User interface and high-level protocols (HTTP, DNS). | SQL Injection, XSS, Phishing. |
03 IP Addressing and Network Segmentation
Definition
Lateral Movement
Techniques used by attackers to move deeper into a network after gaining initial access.
Definition
DMZ (Demilitarized Zone)
A physical or logical subnetwork that exposes an organization's external-facing services to a larger, untrusted network.
Key Takeaways
- 1Cybersecurity is rooted in an understanding of network architecture.
- 2The OSI model helps in systematic vulnerability mapping.
- 3Network segmentation prevents attacker lateral movement.
CH.01
Chapter Complete
Chapter Progress
Reading
Exercise
Interact with the visualization
Quiz
Scalability Foundations Quiz
Test your understanding of the differences between performance, scalability, and the CAP Theorem.
Ready to test your knowledge?
5 questionsRandomized from pool70% to pass