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.

Northeastern University
Skills you'll gain: Open Web Application Security Project (OWASP), Security Information and Event Management (SIEM), Incident Response, Identity and Access Management, Incident Management, Cybersecurity, Event Monitoring, Network Security, Authentications, Application Security, Secure Coding, IT Security Architecture, Authorization (Computing), Cyber Security Assessment, Role-Based Access Control (RBAC), DevSecOps, Endpoint Security, Vulnerability Assessments, Infrastructure Security, Security Testing
Mixed · Course · 1 - 3 Months

Skills you'll gain: iOS Development, Secure Coding, Encryption, Network Security, Swift Programming, Mobile Security, Application Security, Data Persistence, Data Storage Technologies, Key Management, Data Security, File Systems, Cryptography
Mixed · Course · 1 - 4 Weeks

Simplilearn
Skills you'll gain: Network Troubleshooting, Performance Tuning, Docker (Software), Virtual Networking, Network Administration, Network Security, Network Performance Management, Containerization, Application Deployment, General Networking, Hardware Troubleshooting, Security Controls, Scenario Testing, Real Time Data
Beginner · Course · 1 - 4 Weeks

Cisco Learning and Certifications
Skills you'll gain: OSI Models, Network Security, Network Protocols, Network Performance Management, Network Architecture, Network Monitoring, Role-Based Access Control (RBAC), Network Troubleshooting, Computer Networking, Network Administration, TCP/IP, Network Planning And Design, Cybersecurity, Routing Protocols, Firewall, Network Routing, Network Analysis, IT Infrastructure, Cloud Computing, Automation
★ 4.8 (33) · Beginner · Specialization · 3 - 6 Months

EC-Council
Skills you'll gain: Digital Forensics, Network Security, Incident Response, Cryptography, Penetration Testing, Vulnerability Management, Cybersecurity, Application Security, Cyber Security Policies, Security Information and Event Management (SIEM), Threat Detection, Network Monitoring, Cloud Security, Vulnerability Assessments, Malware Protection, Mobile Security, Identity and Access Management, Internet Of Things, Risk Analysis, Web Applications
★ 4.9 (48) · Beginner · Professional Certificate · 3 - 6 Months

Skills you'll gain: Cryptography, Network Security, Cryptographic Protocols, Virtual Networking, Software-Defined Networking, Network Infrastructure, Network Architecture, Encryption, Network Performance Management, Virtualization, Program Development, Hardware Architecture, Virtual Machines, Open Source Technology, Performance Tuning, Unit Testing
★ 4.6 (137) · Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Incident Response, Network Security, Intrusion Detection and Prevention, Command-Line Interface, Cryptography, Cyber Security Strategy, Open Web Application Security Project (OWASP), Application Security, Secure Coding, Cybersecurity, IT Security Architecture, Encryption, Information Systems Security, Vulnerability Assessments, Cyber Attacks, Risk Management Framework, Multi-Factor Authentication, Cloud Security, Penetration Testing, Risk Management
★ 4.7 (65) · Intermediate · Specialization · 3 - 6 Months

Akamai Technologies, Inc.
Skills you'll gain: SQL, Linux, Endpoint Security, Database Management, Incident Response, Relational Databases, Network Security, Vulnerability Scanning, Computer Security Incident Management, Security Management, Databases, Incident Management, Linux Administration, File Systems, Routing Protocols, OSI Models, Application Development, Remote Access Systems, Scripting, Scripting Languages
★ 4.7 (370) · Beginner · Professional Certificate · 3 - 6 Months

Institut Mines-Télécom
Skills you'll gain: Network Engineering, Wireless Networks, Network Security, General Networking, Network Architecture, Network Infrastructure, Mobile Security, Network Protocols, Telecommunications, Digital Communications, Dataflow, Authentications, Encryption
★ 4.7 (135) · Intermediate · Course · 1 - 3 Months

Institut Mines-Télécom
Skills you'll gain: Wireless Networks, Network Architecture, Software-Defined Networking, Network Planning And Design, Virtual Networking, Network Security, Service Oriented Architecture, Emerging Technologies, Network Protocols, Telecommunications, Mobile Security, Interoperability, Digital Communications, Authentications, Encryption, Authorization (Computing)
★ 4.6 (119) · Intermediate · Course · 1 - 3 Months

Microsoft
Skills you'll gain: Network Troubleshooting, Microsoft Azure, Virtual Networking, Virtual Machines, Load Balancing, System Configuration, Cloud Security, Network Planning And Design, Network Security, Cloud Storage, Cloud Management, Data Storage, Data Security, Performance Tuning
★ 4.8 (15) · Beginner · Course · 1 - 4 Weeks

Cisco Learning and Certifications
Skills you'll gain: Network Performance Management, Network Monitoring, Network Administration, Network Troubleshooting, Network Support, General Networking, Event Monitoring, Network Security, Network Infrastructure, System Monitoring, Command-Line Interface, Software-Defined Networking, Application Programming Interface (API), Performance Tuning, System Configuration, Network Protocols, Security Controls, Configuration Management
Beginner · Course · 1 - 3 Months