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Network Security for Beginners: Cybersecurity & Firewalls

Name: Network Security for Beginners: Cybersecurity & Firewalls
Rating: 4.8 (50 reviews)

Understand firewalls, IDS/IPS, common cyber threats, and access controls to explain how networks are protected.

Created byNetDefense Academy

Last updated 9/2026

English

English [Auto],

What you'll learn

Explain how threats, vulnerabilities, and security controls relate to network risk.
Compare packet-filtering, proxy, and next-generation firewalls.
Describe how firewall rules and policies control network traffic.
Distinguish intrusion detection from intrusion prevention.
Identify common defensive approaches to malware, ransomware, DDoS attacks, and zero-day threats.
Explain how access controls, segmentation, and least privilege support network protection.

Course content

8 sections • 29 lectures • 8h 22m total length

Introduction to Network Security16:41
Quick Points About This Learning Journey!0:44
Understanding the Importance of Network Security7:48
Understand why network security underpins trust by protecting confidentiality, integrity, and availability, and explore defenses like firewalls, encryption, IDS/IPS, and data loss prevention against modern threats.
Common Cyber Threats & Security Risks Explained36:37
Evolution of Network Security (Past → Present → Future)20:37
Trace the evolution of network security from early firewalls to zero trust and cloud-based protections. Learn how IDS/IPS, VPNs, encryption, UTM, NGFW, AI/ML-driven analytics, and SOAR shape modern defense.
Quiz

Fundamentals of Network Architecture14:16
Basics of Network Architecture and Components29:44
Identifying Vulnerabilities in Network Infrastructure20:56
Identify vulnerabilities in network infrastructure through automated scanning, manual inspection, and pen testing, then mitigate risk with patch management, configuration auditing, continuous monitoring, and vendor alerts and threat intelligence.
Anatomy of a Cyber Attack Explained21:51
Explore the anatomy of cyber attacks, aka the cyber kill chain, covering recognitions, initial access, privilege escalation, lateral movement, data exfiltration, and post-attack activities.
Knowledge Check Quiz

What is a Firewall? Roles & Real-World Use Cases14:17
Learn how the network firewall serves as a digital gatekeeper by monitoring, filtering, and controlling incoming and outgoing traffic through security rules, NAT, and deployment across hardware, software, or cloud.
Defining Network Firewalls and Their Role in Security26:13
Types of Firewalls (Packet Filtering, Proxy, NGFW)38:41
Firewall Technologies and Deployment Strategies29:11
Knowledge Check Quiz

Functionality and Benefits of Network Firewalls8:10
Firewall Rules & Policies Explained25:32
Intrusion Detection & Prevention Systems (IDS/IPS)17:22
Explore the differences between intrusion detection systems and intrusion prevention systems within next-gen firewalls, showing how IDS detects and IPS blocks malicious traffic to protect networks.
Application Control & Content Filtering Techniques33:46
Explore application control and content filtering techniques to strengthen cyber security and network security fundamentals.
Knowledge Check Quiz

Threat Prevention and Mitigation Strategies11:23
Explore threat prevention and mitigation through risk assessment, a multi-layered security approach, and practices like patching, access control, backups, monitoring, and incident response to protect data.
Proactive Measures against Malware, Viruses, and Ransomware7:36
Implement proactive measures against malware, viruses, and ransomware using antivirus software, updates, firewalls, MFA, backups, and email security and user education to detect and mitigate threats.
DDoS Attacks: Detection & Mitigation Techniques18:04
Detect and mitigate DDoS attacks by applying traffic scrubbing, anomaly detection, load balancing with redundancy, rate limiting, CDNs, WAF, ISP collaboration, and incident response planning.
Zero-Day Attacks & Vulnerability Management9:59
Knowledge Check Quiz

Security Best Practices and Policies2:28
Designing & Implementing Effective Security Policies11:03
Assess security risks and understand compliance requirements to guide policy development. Create clear policies on access control, data protection, and incident response, train staff, and implement regular reviews and updates.
Authentication, Authorization & Access Control (AAA)17:22
Learn about user access control and authentication mechanisms, including rbac, dac, mac, abac, least privilege, passwords, mfa, biometrics, tokens, and certificate-based authentication.
Network Segmentation & Least Privilege Principles9:52
Explore network segmentation and the least privilege principle to boost security via isolation and traffic control. Learn how IP subnetting and VLANs enable segmentation with firewalls and ACLs.
Knowledge Check Quiz

Advanced Firewall Technologies and Trends8:18
Next-Generation Firewall (NGFW) Deep Dive17:24
Explore next-generation firewalls' application-aware controls, IPS, deep packet inspection, user-based policies, ssl decryption, advanced threat detection, and vpn and cloud-gen capabilities for robust network security.
Cloud Security & SD-WAN Firewall Integration7:32
AI/ML in Cybersecurity & Future Trends19:07
Explore how AI and machine learning enhance cyber security with proactive threat detection, automated incident response, zero trust, and adaptive defenses in next-gen firewalls and edge devices.
Knowledge Check Quiz

Requirements

No previous cybersecurity knowledge required.
Basic familiarity with IP addresses, network devices, and the internet is helpful.
A device with internet access to watch the lessons.
Willingness to learn cybersecurity concepts and explore real-world security scenarios.

Description

Cybersecurity becomes easier to understand when you can see how threats, networks, and security controls fit together.

If you are new to network security, terms such as firewalls, intrusion prevention, segmentation, and least privilege can feel disconnected. This course brings those concepts together in a structured introduction to how networks are protected.

You will begin with network security foundations: why protection matters, where networks can be vulnerable, and how common cyber attacks progress. From there, you will explore firewalls in greater depth, including their role, different types, deployment approaches, and security policies.

Explore the controls behind network defense

Compare packet-filtering, proxy, and next-generation firewalls. Discover how intrusion detection and prevention systems support network protection, and where application control and content filtering fit into a wider security strategy.

Connect threats to defensive approaches

Explore malware, ransomware, DDoS attacks, and zero-day vulnerabilities. Learn the purpose of preventive and mitigating controls, and why effective protection requires multiple layers.

Build your understanding of access and network boundaries

Examine authentication, authorization, access control, network segmentation, and least privilege. These concepts help explain how organizations limit access and reduce the opportunities for threats to spread.

Put emerging technologies into context

The final section introduces next-generation security capabilities, cloud security, SD-WAN integration, and AI/ML trends so you can connect foundational concepts to the wider cybersecurity landscape.

Who should take this course?

This course is designed for cybersecurity beginners, IT students, and IT or networking professionals who want a structured introduction to network defense. No previous cybersecurity study is required. Familiarity with IP addresses, network devices, and the internet will help you follow the material.

The focus is on understanding security concepts and the purpose of different controls. This foundation can support your next steps into more advanced study and vendor-specific training.

Start with the fundamentals and build a clearer understanding of how network security works.

Who this course is for:

Beginners seeking a structured introduction to network security.
IT students and graduates building security foundations.
IT support and networking professionals expanding their security knowledge.
Anyone interested in understanding cyber threats, hacking concepts, and how to protect systems and networks.

Network Security for Beginners: Cybersecurity & Firewalls

What you'll learn

Explore related topics

Course content

Network Security Foundations5 lectures • 1hr 22min

Network Architecture & Attack Surface4 lectures • 1hr 27min

Firewall Fundamentals (Core Security Layer)4 lectures • 1hr 48min

Firewall Features & Security Capabilities4 lectures • 1hr 25min

Threat Prevention & Cyber Defense Strategies4 lectures • 47min

Security Best Practices & Access Control4 lectures • 41min

Advanced Security Technologies & Future Trends4 lectures • 52min

Interview1 lecture0

Requirements

Description

Who this course is for: