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.

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

National Taiwan University
Skills you'll gain: Operations Research, Network Model, Statistical Machine Learning, Case Studies, Applied Mathematics, Mathematical Modeling, Machine Learning, Model Optimization, Mathematical Theory & Analysis, Transportation Operations, Business Analytics, Linear Algebra, Resource Allocation, Classification Algorithms, Algorithms
★ 4.9 (97) · Advanced · Course · 1 - 3 Months

Skills you'll gain: Linux, Package and Software Management, Linux Administration, Red Hat Enterprise Linux, Linux Commands, User Accounts, Operating System Administration, User Provisioning, OS Process Management, Bash (Scripting Language), Command-Line Interface, File Management, Unix Shell, Shell Script, Identity and Access Management, File Systems, System Monitoring, System Support, Network Administration, General Networking
★ 4.8 (109) · Beginner · Course · 1 - 3 Months

University of Colorado System
Skills you'll gain: Cryptography, Cryptographic Protocols, Data Integrity, Encryption, Authentications, Data Security, Data Encryption Standard, Advanced Encryption Standard (AES), Digital Communications
★ 4.5 (102) · Intermediate · Course · 1 - 4 Weeks

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

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

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

Coursera
Skills you'll gain: Data-Driven Marketing, Google Ads, Google Analytics, Marketing Analytics, Data Integration, Web Analytics, Data Access
Beginner · Course · 1 - 4 Weeks

Microsoft
Skills you'll gain: Role-Based Access Control (RBAC), Azure Active Directory, Microsoft Azure, Cloud Management, Cyber Governance, System Monitoring, Identity and Access Management, Cloud Security, Enterprise Security, Data Security, Authorization (Computing), User Provisioning, Multi-Factor Authentication, Cyber Security Policies, Cloud Infrastructure
★ 4.7 (23) · Intermediate · Course · 1 - 4 Weeks

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

Skills you'll gain: Test Automation, Test Script Development, Debugging, Test Case, Test Tools, Selenium (Software), Software Testing, Development Testing, API Testing, Integration Testing, Maintainability, Test Engineering, Business Process Automation, Automation, Code Reusability, Scalability
Advanced · Course · 1 - 4 Weeks

Skills you'll gain: Customer Retention, Customer Analysis, Customer experience improvement, Customer Support, Data Analysis, Predictive Modeling, Operational Analysis, Operational Efficiency, AI literacy, Anomaly Detection, Network Monitoring, AI Integrations, Digital Transformation
★ 4.5 (11) · Beginner · Course · 1 - 4 Weeks