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.

Packt
Skills you'll gain: Threat Management, Threat Modeling, Vulnerability Assessments, Incident Response, Computer Security Incident Management, Vulnerability Management, Threat Detection, Cyber Security Assessment, Cyber Threat Intelligence, Risk Mitigation, Security Management, Hardening, Application Security, Infrastructure Security
Advanced · Course · 1 - 4 Weeks

Packt
Skills you'll gain: Open Web Application Security Project (OWASP), Secure Coding, Application Security, Data Security, Cybersecurity, Cyber Attacks, Web Applications, Threat Detection, Security Awareness, Vulnerability Management, Encryption, Authentications, Authorization (Computing), PHP (Scripting Language)
Beginner · Course · 1 - 3 Months

Skills you'll gain: Enterprise Architecture, Virtualization, Network Architecture, Network Planning And Design, Virtual Local Area Network (VLAN), Virtual Private Networks (VPN), Virtual Machines, Network Infrastructure, Wide Area Networks, Software-Defined Networking, Wireless Networks, Local Area Networks, Network Performance Management, Network Switches, Network Routers, Scalability, Network Protocols
Intermediate · Course · 1 - 3 Months

Cisco Learning and Certifications
Skills you'll gain: Development Environment, Software Development Methodologies, CI/CD, DevOps, IT Automation, Version Control, Continuous Integration, Network Engineering, Network Architecture, Docker (Software), Software Development, Software Engineering, Virtual Environment, Git (Version Control System), Waterfall Methodology, Agile Methodology, Virtual Machines, Software Design
Intermediate · Course · 1 - 4 Weeks

LearnQuest
Skills you'll gain: Network Architecture, Network Protocols, Wireless Networks, Network Performance Management, Network Planning And Design, Network Infrastructure, Communication Systems, Telecommunications, Emerging Technologies
Intermediate · Course · 1 - 4 Weeks

University of California San Diego
Skills you'll gain: Social Network Analysis, Network Analysis, Graph Theory, Technical Communication, Data Structures, Algorithms, Analysis, Computer Science, Research
Mixed · Course · 1 - 3 Months

Icahn School of Medicine at Mount Sinai
Skills you'll gain: Bioinformatics, Unsupervised Learning, Biostatistics, Biology, Machine Learning Algorithms, Data Processing, Statistical Methods, Systems Engineering, Unix Commands, Linux Commands
Intermediate · Course · 1 - 3 Months

Macquarie University
Skills you'll gain: Responsible AI, Information Privacy, Personally Identifiable Information, Data Security, Threat Detection, Threat Modeling, Vulnerability Assessments, Data Governance, Data Management, Cyber Security Strategy, Data Integrity, Data Loss Prevention, Cloud Security, Cybersecurity, Security Awareness, Artificial Intelligence and Machine Learning (AI/ML), Security Management, Security Controls, Cyber Operations, Data Science
Beginner · Specialization · 3 - 6 Months

Skills you'll gain: TCP/IP, OSI Models, General Networking, IT Automation, Network Administration, Network Monitoring, Software-Defined Networking, Computer Networking, Network Routing, Network Infrastructure, Network Architecture, Scripting, Network Protocols, Application Programming Interface (API)
Intermediate · Course · 1 - 4 Weeks

University of Colorado Boulder
Skills you'll gain: Network Analysis, Social Network Analysis, Marketing Analytics, Unstructured Data, Semantic Web, Statistical Methods, Text Mining, Data Structures, JSON, Natural Language Processing, Data Visualization Software, Visualization (Computer Graphics), Python Programming
Build toward a degree
Intermediate · Course · 1 - 4 Weeks

University of Pennsylvania
Skills you'll gain: Social Network Analysis, Network Analysis, Social Sciences, Sociology, Agentic systems, Systems Thinking, Economics, Policy, and Social Studies, Simulations, Culture, Complex Problem Solving, Innovation
Beginner · Course · 1 - 3 Months

Skills you'll gain: Cyber Threat Hunting, Incident Response, Cyber Threat Intelligence, Penetration Testing, Computer Security Incident Management, Intrusion Detection and Prevention, Threat Modeling, Threat Detection, MITRE ATT&CK Framework, Cryptography, Security Testing, Incident Management, Application Security, Encryption, Security Management, Cybersecurity, Vulnerability Scanning, Vulnerability Assessments, Open Web Application Security Project (OWASP), Security Information and Event Management (SIEM)
Beginner · Specialization · 3 - 6 Months