Network Defense
Course Description
Every organization needs a strong network defense. But what does that actually mean? This course from Cisco Networking Academy gives you the hands-on skills to protect, detect, and respond to network-based threats.
You'll learn how to configure firewalls to filter malicious traffic, set up intrusion detection and prevention systems (IDS/IPS) to spot attacks in real time, and implement VPNs for secure remote access. The course also covers security monitoring, log analysis, and basic incident response procedures. You'll work in virtual labs, configuring real security devices and analyzing attack traffic.
This free, self-paced course takes about 20 hours to complete. It's ideal for cybersecurity students, network administrators, and IT professionals who want to build defensive security skills. Upon completion, you'll earn an official Cisco digital badge. The course is excellent preparation for the Cisco Certified CyberOps Associate and other security certifications.
Course Provider
Provider: Cisco Networking Academy, a global leader in IT and cybersecurity education.
Platform: Cisco NetAcad online platform – fully online, self-paced, with integrated virtual labs.
Accreditation: This course aligns with industry standards for network defense and is excellent preparation for Cisco CyberOps Associate, CompTIA Security+, and other security certifications.
Course Syllabus (Key Modules)
Learning Objectives
- Design and implement a defense-in-depth strategy for networks.
- Configure firewalls (ACLs, zone-based) to filter traffic and enforce security policies.
- Deploy and tune IDS/IPS to detect and prevent network attacks.
- Implement VPNs (IPsec, SSL) for secure remote access.
- Monitor network traffic and analyze logs for signs of compromise.
- Follow incident response procedures to contain and remediate attacks.
- Earn a Cisco digital badge demonstrating network defense skills.
Course Prerequisites
Technical: Strong understanding of networking fundamentals (TCP/IP, routing, switching) and basic knowledge of cybersecurity concepts. Prior completion of Cisco's Networking Basics and Introduction to Cybersecurity is highly recommended.
Recommended prior courses: Networking Basics, Introduction to Cybersecurity, or equivalent knowledge.
Who should take this: Cybersecurity students, network administrators, security analysts, and IT professionals who want to build hands-on defensive security skills.
User Reviews
"This course was the perfect next step after Networking Basics. The firewall configuration labs were excellent—I finally understand ACLs. The IDS/IPS module was eye-opening; now I can actually interpret alerts and know what to do. The VPN section was also very practical for my job as a network admin. Highly recommended."
"I'm studying for the Cisco CyberOps Associate exam, and this course covered many of the key topics. The hands-on labs are the best part—you're not just watching videos, you're actually configuring firewalls and analyzing logs. The Cisco badge is a nice bonus. Worth the time for anyone serious about network security."
"Solid intermediate course. The incident response module was particularly good—real-world procedures, not just theory. My only critique is that some labs require careful attention to detail (which is realistic), but the instructions are clear. If you're a beginner, take Networking Basics first. Otherwise, dive in."
Based on 950+ ratings on Cisco NetAcad.
💡 Final Thoughts
Network defense is a core cybersecurity skill. You can't protect what you don't understand. This Cisco course bridges the gap between theory and practice by giving you real hands-on experience with firewalls, IDS/IPS, VPNs, and security monitoring. You'll come away able to actually configure security devices, not just talk about them. The course assumes you already understand networking basics, so complete that first if needed. But if you're ready, this free course is an excellent way to build practical defensive skills that are in high demand. The Cisco badge is credible, but the real value is the ability to protect real networks. Highly recommended for aspiring security analysts and network admins.
Network Defense (Cisco) – FAQ
Is this course really free?
Yes, completely free. Cisco Networking Academy offers this course at no cost. You just need a free NetAcad account.
Do I need prior experience?
Yes. This is an intermediate-level course. You need a solid understanding of networking (TCP/IP, routing, switching). Take Networking Basics first if you're a beginner.
How long does the course take?
The course is self-paced and takes approximately 20 hours. Plan to spend several weeks if you study part-time.
Will I receive a certificate or badge?
Yes, upon passing the final exam, you'll earn an official Cisco digital badge. You can share it on LinkedIn and other platforms.
Does this course include hands-on labs?
Yes, the course includes virtual labs where you configure firewalls, IDS/IPS, VPNs, and analyze security logs. No software installation required.
How does this compare to the Ethical Hacker course?
Network Defense is about protecting networks (defensive security). Ethical Hacker is about finding vulnerabilities (offensive security). Both are valuable and complementary. Take both if you want a well-rounded cybersecurity education.