Network Security Fundamentals: CIA Triad, Firewalls, Encryption & More 🔒

Welcome to **Day 4 of Computer Networks Interview Series** 🚀

In this video, we cover **Network Security concepts** that are extremely important for both **placements and interviews**. You’ll learn about **firewalls, encryption, threats, and CIA triad**, all explained in a simple and interview-focused manner.

📘 **Topics Covered in Day 4**:

* CIA Triad (Confidentiality, Integrity, Availability)
* Firewall vs IPS (Intrusion Prevention System)
* Zone-based Firewall (Stateful firewall)
* Threat vs Vulnerability vs Risk
* Symmetric vs Asymmetric Encryption
* Diffie-Hellman Groups (Security Levels)

📑 **Download Notes (Day 4)** 👉 [Click Here](https://excalidraw.com/#json=hFcJvZnVD5eQxQ6IP2mRe,QwEAH8mdwLkL8C9Cxsm27Q)

🎯 Best for:

* **Placement preparation** (Amazon, Microsoft, Infosys, TCS, Wipro, Accenture, etc.)
* **Computer Science / IT students**
* **Quick revision before interviews**

👉 Don’t forget to check out the **complete playlist: "Crack Computer Networks in 7 Days | 50+ Interview Questions"**

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