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.

University of Colorado System
Skills you'll gain: Network Security, Distributed Denial-Of-Service (DDoS) Attacks, Hardening, Cryptographic Protocols, Cybersecurity, Encryption, Security Controls, Proxy Servers, Information Privacy, Servers, Communication Systems, Web Servers, Network Routing, Network Analysis, Cloud Hosting, Cloud Deployment
★ 4.1 (36) · Intermediate · Course · 1 - 4 Weeks

University of Colorado Boulder
Skills you'll gain: OSI Models, Network Security, TCP/IP, Network Architecture, Network Protocols, Network Routing, Network Routers, Computer Networking, Infrastructure Security, Routing Protocols, Public Key Infrastructure, Network Model, Cryptographic Protocols, Web Applications, Application Servers
★ 4.6 (93) · Intermediate · Course · 1 - 3 Months

EDUCBA
Skills you'll gain: Microsoft Azure, Network Troubleshooting, Network Security, Network Architecture, Virtual Networking, Network Administration, Wide Area Networks, IT Security Architecture, Hardening, Virtual Private Networks (VPN), Network Infrastructure, Network Routing, Border Gateway Protocol, Remote Access Systems
★ 4.8 (37) · Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Routing Protocols, TCP/IP, Network Troubleshooting, OSI Models, Network Switches, Data Centers, Network Routers, Virtual Local Area Network (VLAN), Network Protocols, Network Security, Network Administration, General Networking, Network Routing, Virtualization and Virtual Machines, Computer Networking, Virtual Machines, Network Monitoring, Network Model, Networking Hardware, Local Area Networks
★ 4.8 (65) · Intermediate · Specialization · 3 - 6 Months

Skills you'll gain: Network Planning And Design, Network Troubleshooting, Internet Of Things, Network Security, Network Engineering, Network Architecture, Computer Networking, Network Infrastructure, Network Routers, TCP/IP, Network Routing, Virtual Local Area Network (VLAN), Routing Protocols, System Configuration, Network Switches, Firewall, Enterprise Architecture, Dynamic Host Configuration Protocol (DHCP), Scalability
Intermediate · Course · 1 - 4 Weeks

LearnKartS
Skills you'll gain: Computer Security Incident Management, Vulnerability Management, Cyber Security Strategy, Cyber Governance, Incident Response, Cyber Operations, Cyber Threat Intelligence, Encryption, Cyber Attacks, Governance Risk Management and Compliance, Incident Management, Cryptographic Protocols, Threat Detection, Security Strategy, IT Security Architecture, Mobile Security, Vulnerability, Security Awareness, Vulnerability Assessments, Vulnerability Scanning
★ 4.7 (52) · Beginner · Specialization · 1 - 3 Months

Total Seminars
Skills you'll gain: Hardening, Endpoint Security, Endpoint Detection and Response, Intrusion Detection and Prevention, Network Security, Security Controls, Wireless Networks, Application Security, IT Security Architecture, Threat Detection, Authentications, Security Testing, Brute-force attacks, Cyber Attacks, Cryptographic Protocols, Security Management, Security Awareness, Security Strategy, System Configuration, Encryption
Intermediate · Course · 1 - 3 Months

Skills you'll gain: Network Planning And Design, Microsoft Azure, Network Security, Network Troubleshooting, Network Architecture, Network Administration, IT Security Architecture, Firewall, Virtual Private Networks (VPN), Virtual Networking, Role-Based Access Control (RBAC), General Networking, Hybrid Cloud Computing, Data Migration
★ 5 (32) · Intermediate · Course · 1 - 4 Weeks

Johns Hopkins University
Skills you'll gain: Anomaly Detection, Malware Protection, Threat Detection, Network Analysis, AI Security, Cybersecurity, Model Evaluation, Network Security, Machine Learning Methods, Classification Algorithms, Microsoft Windows
★ 4.7 (23) · Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: IT Security Architecture, Network Security, Infrastructure Security, Enterprise Application Management, Software-Defined Networking, Computer Networking, Application Security, Zero Trust Network Access, Security Engineering, Network Architecture, Cybersecurity, Enterprise Architecture, Software Quality Assurance, Cloud Security, General Networking, DevSecOps, Cryptography
★ 4.5 (6) · Advanced · Course · 1 - 4 Weeks

Whizlabs
Skills you'll gain: Infrastructure Security, Vulnerability Scanning, Network Security, Amazon Web Services, Firewall, Vulnerability Assessments, Network Infrastructure, Virtual Networking, Security Controls, Cloud Security, Vulnerability Management, Endpoint Security, Network Planning And Design, Distributed Denial-Of-Service (DDoS) Attacks, Load Balancing
★ 4 (7) · Intermediate · Course · 1 - 4 Weeks

LearnQuest
Skills you'll gain: Blockchain, Cryptography, Network Security, Secure Coding, Cryptographic Protocols, Distributed Denial-Of-Service (DDoS) Attacks, Encryption, Cybersecurity, Key Management, Vulnerability Assessments, Authorization (Computing), Code Review, Dependency Analysis
Advanced · Course · 1 - 3 Months