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.

Coursera
Skills you'll gain: Red Hat Enterprise Linux, Linux Administration, Operating System Administration, Linux Servers, Hardening, Linux, Package and Software Management, Systems Administration, Configuration Management, System Configuration, Linux Commands, System Monitoring, Information Technology Operations, Servers, Vulnerability Scanning, Security Controls, User Provisioning, Patch Management, Network Performance Management, Vulnerability Assessments
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Routing Protocols, Software-Defined Networking, Wide Area Networks, Virtual Networking, Network Troubleshooting, Open Shortest Path First (OSPF), Network Routing, Network Architecture, Network Monitoring, Network Planning And Design, Virtual Private Networks (VPN), Border Gateway Protocol, Network Performance Management, Network Security, Network Administration, Network Engineering, Firewall, Amazon Web Services, Cloud Services, Network Infrastructure
★ 5 (7) · Beginner · Specialization · 1 - 3 Months

Infosec
Skills you'll gain: Cyber Governance, Security Strategy, Security Management, Incident Management, Cyber Security Strategy, Business Continuity Planning, IT Security Architecture, Computer Security Incident Management, Business Continuity, Disaster Recovery, Cyber Security Policies, Cybersecurity, Incident Response, Data Governance, Governance, Contingency Planning, Security Controls, Asset Management, Cyber Security Assessment, Risk Analysis
★ 4.6 (55) · Mixed · Course · 3 - 6 Months

University of Colorado Boulder
Skills you'll gain: Image Analysis, Computer Vision, Deep Learning, Convolutional Neural Networks, Machine Learning Methods, Data Ethics, Microsoft Excel, Generative AI, Excel Formulas, Responsible AI, Data Transformation, Linear Algebra, Feature Engineering, Digital Signal Processing
★ 4.5 (44) · Beginner · Course · 1 - 4 Weeks

Simplilearn
Skills you'll gain: Social Media, Social Media Marketing, Social Media Management, Social Media Strategy, Social Media Content, Social Media Campaigns, Marketing Strategies, Content Performance Analysis, Data-Driven Marketing, Social Media Analytics, Campaign Management, Marketing Effectiveness, Email Marketing, Marketing Analytics, Digital Marketing, Marketing Planning, Marketing, Strategic Marketing, UI/UX Strategy, Brand Management
★ 4.5 (37) · Beginner · Specialization · 1 - 3 Months

Skills you'll gain: Key Performance Indicators (KPIs), Dashboard, Stakeholder Communications, Data Storytelling, Microsoft Outlook, Dashboard Creation, Performance Measurement, Email Marketing, Google Analytics, Business Intelligence, Data-Driven Marketing, Stakeholder Management, Stakeholder Engagement, Content Performance Analysis, Performance Metric, Performance Reporting, A/B Testing, Campaign Management, Strategic Planning, Data Visualization
Intermediate · Specialization · 3 - 6 Months

Microsoft
Skills you'll gain: Multi-Factor Authentication, Data Security, Security Strategy, Authentications, Database Application, Azure Active Directory, Virtual Machines, Microsoft SQL Servers, Microsoft Azure, Cloud Security, Security Controls, Identity and Access Management, Application Security, Virtualization and Virtual Machines, Network Security, Role-Based Access Control (RBAC), Encryption, Authorization (Computing)
★ 4.6 (20) · Intermediate · Course · 1 - 4 Weeks

University of Maryland, College Park
Skills you'll gain: Cybersecurity, Cyber Security Policies, Cyber Risk, Risk Management, Cyber Governance, Cyber Attacks, Stakeholder Engagement, Risk Mitigation, Business Risk Management, Cyber Security Strategy, Risk Management Framework, Stakeholder Communications, Operational Risk, Enterprise Risk Management (ERM), Security Management, Information Systems Security, Risk Analysis, Threat Management, Security Controls, Information Assurance
★ 4.4 (13) · Beginner · Course · 1 - 3 Months

LearnKartS
Skills you'll gain: Workplace Bullying Intervention, Diversity Awareness, Workplace inclusivity, Safety Culture, Labor Law, Accountability, Compliance Management, Disciplinary Procedures, Ethical Standards And Conduct, Strong Work Ethic, Professional Development, Behavior Management, Safety and Security, AI Enablement, Social Media, Culture
★ 4.8 (190) · Beginner · Course · 1 - 4 Weeks

Infosec
Skills you'll gain: File Systems, Digital Forensics, Microsoft Windows, File Management, Operating Systems, Data Structures, Data Validation, Data Storage Technologies, Data Storage, Computer Hardware, Digital Analysis
★ 4.7 (89) · Intermediate · Course · 1 - 3 Months

Edureka
Skills you'll gain: Performance Tuning, Web Development, Web Applications, Software Architecture, Other Programming Languages, Network Security, Memory Management
★ 2.8 (14) · Beginner · Course · 1 - 3 Months

Infosec
Skills you'll gain: Secure Coding, C and C++, Application Security, Computer Programming Tools, System Programming, C++ (Programming Language), Software Development Tools, Exploit development, C (Programming Language), Security Software, Debugging, Security Engineering, Security Testing, Interoperability, Unix, Embedded Software, Information Systems Security, OS Process Management, Embedded Systems, Programming Principles
★ 2.7 (36) · Intermediate · Specialization · 3 - 6 Months