CCNA - Chapter 11: Exploring Network Security (Threats, CIA Triad, AAA & Wireshark)
In this episode of the CyberEd CCNA series, we explore the fundamentals of network security and why protecting systems, devices, and data is critical in modern networks.
You’ll learn about common cyber threats, vulnerabilities, and exploits, along with the types of attacks that can impact enterprise networks. We also break down the CIA Triad (Confidentiality, Integrity, and Availability) and explain how organizations use Authentication, Authorization, and Accounting (AAA) to control access to network devices.
We also introduce Wireshark, one of the most widely used tools for analyzing network traffic and performing packet analysis.
This chapter provides the core security concepts every network engineer or cybersecurity professional should understand when designing and managing secure networks.
📚 Topics Covered
• Security concepts – threats, vulnerabilities, exploits
• The CIA Triad (Confidentiality, Integrity, Availability)
• Types of cyber attacks and malware
• Social engineering attacks
• Password security and MFA
• Authentication, Authorization, and Accounting (AAA)
• RADIUS vs TACACS+
• Introduction to Wireshark packet analysis
• Elements of a security awareness program
🎓 Part of the CyberEd CCNA Training Series
This series is designed to help you understand networking concepts and prepare for the Cisco CCNA certification with clear explanations and practical examples.
📩 Business Enquiries / Questions
If you have any questions about this lesson or networking topics, feel free to contact me: [email protected]
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Timestamps:
00:00 Intro
00:55 Topics Covered
01:10 Security Concepts
02:57 The CIA Triad
05:44 Threats
10:19 Vulnerabilities
14:20 Password Vulnerabilities and Management
15:57 Exploits
17:47 Attacks
22:42 Authentication, Authorization, and Accounting (AAA)
26:10 Elements of a Security Program
27:49 Wireshark 101
30:08 Summary