Network security courses can help you learn about firewalls, intrusion detection systems, and encryption protocols. You can build skills in risk assessment, incident response, and vulnerability management. Many courses introduce tools like Wireshark for network analysis, Nessus for vulnerability scanning, and various security information and event management (SIEM) systems, showing how these skills are applied in practical work to protect networks from cyber threats.

Cisco Learning and Certifications
Skills you'll gain: Network Monitoring, Network Planning And Design
Beginner · Course · 1 - 3 Months

Infosec
Skills you'll gain: Secure Coding, Application Security, Exploitation techniques, Web Applications, Javascript, Web Development, Node.JS, Java Programming
★ 4.6 (37) · Intermediate · Course · 1 - 4 Weeks

LearnKartS
Skills you'll gain: Linux Administration, Red Hat Enterprise Linux, Linux Servers, Network Troubleshooting, Linux, Event Monitoring, Systems Administration, Linux Commands, System Support, Hardening, System Monitoring, Security Controls, System Configuration, Network Administration, Authorization (Computing), Operating Systems, Unix Shell, Unix Commands, Command-Line Interface, Disaster Recovery
Advanced · Course · 1 - 4 Weeks

Total Seminars
Skills you'll gain: Security Controls, Malware Protection, Incident Response, Endpoint Security, Threat Management, Threat Detection, Incident Management, Information Technology Operations, Authentications, Hardening, Vulnerability Management, Security Testing, Security Management, Security Awareness, Security Engineering, Security Software, Human Factors (Security), Safety Standards, Operational Performance Management, Change Management
Intermediate · Course · 1 - 3 Months

Skills you'll gain: Malware Protection, Computer Security Awareness Training, Cybersecurity, Security Awareness, Cyber Attacks, Data Loss Prevention, Data Security, Network Security, Human Factors (Security), Threat Detection, Security Controls, Email Security, Wireless Networks
Beginner · Course · 1 - 4 Weeks
Skills you'll gain: Application Security, Angular, OAuth, Test Driven Development (TDD), Cryptography, Web Components, Data Validation, Unit Testing, Vue.JS, Development Testing, Data Security, Authentications, Encryption, Authorization (Computing), HTML and CSS, Hypertext Markup Language (HTML), Web Applications, Javascript, Security Strategy, Computer Programming
★ 4.3 (102) · Beginner · Specialization · 1 - 3 Months

Coursera
Skills you'll gain: AI Security, Threat Modeling, Open Web Application Security Project (OWASP), Security Testing, Retrieval-Augmented Generation, Software Architecture, API Design, Test Automation, Vulnerability Management, Agentic systems, Systems Design, Model Evaluation, Test Driven Development (TDD), CI/CD, Python Programming, Continuous Deployment, Dependency Analysis, Large Language Modeling, Machine Learning, Performance Analysis
Intermediate · Specialization · 3 - 6 Months

Skills you'll gain: Data Preprocessing, Deep Learning, Data Processing, Artificial Neural Networks, Logistic Regression, Applied Machine Learning, Program Development, Python Programming, Network Architecture, Model Training, Model Optimization, Machine Learning Algorithms, NumPy, Pandas (Python Package), Linear Algebra
Beginner · Course · 1 - 3 Months

Illinois Tech
Skills you'll gain: Infrastructure As A Service (IaaS), Operating System Administration, Cloud Security, Cloud Infrastructure, Identity and Access Management, Cloud Services, AWS Identity and Access Management (IAM), Cloud Management, Cloud Computing, Incident Response, Cloud Platforms, Disaster Recovery, Cloud Computing Architecture, Cloud Applications, Microsoft Windows, Operating Systems, System Configuration, Firewall, Linux Administration, Risk Management
★ 4.7 (34) · Intermediate · Specialization · 3 - 6 Months

LearnQuest
Skills you'll gain: Threat Modeling, IT Security Architecture, Network Security, Security Architecture Review, Internet Of Things, Identity and Access Management, Encryption, Cybersecurity, Security Controls, Threat Management, Cloud Security, Vulnerability Assessments, Cloud Solutions, Cryptographic Protocols, Systems Architecture, Cloud Services, Cloud Deployment, Cryptography, Information Privacy
Intermediate · Course · 1 - 4 Weeks

Infosec
Skills you'll gain: Application Security, Serverless Computing, Secure Coding, Risk Management Framework, Cloud Security, Threat Management, Infrastructure Security, Cloud Services, Cloud Platforms, Javascript, Node.JS
★ 4.6 (32) · Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Threat Modeling, Incident Response, IT Security Architecture, Incident Management, Security Architecture Review, Application Security, Identity and Access Management, Security Testing, Continuous Monitoring, Information Systems Security, Network Security, Security Strategy, Systems Architecture, Security Management, Security Engineering, Zero Trust Network Access, Security Awareness, Risk Management Framework, Cybersecurity, Enterprise Architecture
★ 4.1 (7) · Beginner · Specialization · 1 - 3 Months