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 London
Skills you'll gain: Network Security, IT Security Architecture, OSI Models, TCP/IP, Network Protocols, Computer Networking, Cybersecurity, Network Architecture, General Networking, Cryptographic Protocols, Vulnerability Assessments, Network Infrastructure
★ 4.9 (33) · Beginner · Course · 1 - 3 Months

Skills you'll gain: Network Security, Virtual Private Networks (VPN), Authentications, Firewall, Authorization (Computing), Cybersecurity, General Networking, Network Monitoring, Security Controls, IT Automation, Wireless Networks, Dynamic Host Configuration Protocol (DHCP), Virtual Local Area Network (VLAN), Network Routers, Network Routing, Encryption, Application Programming Interface (API)
Intermediate · Course · 1 - 3 Months

Google Cloud
Skills you'll gain: Distributed Denial-Of-Service (DDoS) Attacks, Network Security, Network Monitoring, Firewall, Google Cloud Platform, Cloud Security, Intrusion Detection and Prevention, Identity and Access Management, Proxy Servers, Threat Detection, Virtual Networking, Authorization (Computing)
★ 4.6 (10) · Intermediate · Course · 1 - 3 Months

Johns Hopkins University
Skills you'll gain: Email Security, Mobile Security, Network Security, Open Web Application Security Project (OWASP), Threat Detection, TCP/IP, Network Analysis, Network Protocols, Cybersecurity, Application Security, Splunk
Intermediate · Course · 1 - 3 Months

Whizlabs
Skills you'll gain: Network Security, Virtual Private Networks (VPN), Microsoft Azure, Firewall, Virtual Networking, Cloud Security, Load Balancing
Intermediate · Course · 1 - 4 Weeks

Cisco Learning and Certifications
Skills you'll gain: Network Security, Role-Based Access Control (RBAC), Cybersecurity, Firewall, Network Monitoring, Authentications, Virtual Private Networks (VPN), Authorization (Computing), Intrusion Detection and Prevention, Security Controls, Encryption
★ 4.7 (9) · Beginner · Course · 1 - 3 Months

Check Point Software Technologies Ltd.
Skills you'll gain: Virtual Private Networks (VPN), Network Security, Firewall, Network Administration, Data Integrity, Network Monitoring, Cyber Security Policies, System Configuration, Network Troubleshooting, Active Directory
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Network Monitoring, Network Security, Incident Response, Anomaly Detection, Network Analysis, Digital Forensics, Cyber Security Assessment, Network Protocols, Threat Detection, Technical Communication, Distributed Denial-Of-Service (DDoS) Attacks, Computer Security, Cybersecurity
★ 4.7 (20) · Intermediate · Course · 1 - 3 Months

Skills you'll gain: Cyber Threat Intelligence, MITRE ATT&CK Framework, Hardening, Cyber Threat Hunting, Exploitation techniques, Linux Commands, Intrusion Detection and Prevention, Cyber Operations, Linux, Cybersecurity, Cyber Security Strategy, Threat Detection, Network Security, Network Monitoring, Cyber Security Assessment, Operating Systems, Cyber Attacks, Cyber Engineering, Network Administration, Security Awareness
Beginner · Course · 1 - 4 Weeks

EC-Council
Skills you'll gain: Network Security, Information Assurance, Cloud Security, Security Controls, Mobile Security, Data Security, Cryptography, Public Key Infrastructure, Cyber Security Policies, Authorization (Computing), Intrusion Detection and Prevention, Network Monitoring, Wireless Networks, Authentications, Cloud Computing, Internet Of Things
★ 5 (6) · Beginner · Course · 1 - 3 Months

The Skill Valley
Mixed · Course · 1 - 4 Weeks

Skills you'll gain: Distributed Denial-Of-Service (DDoS) Attacks, Network Security, Network Monitoring, Proxy Servers, Intrusion Detection and Prevention, Threat Detection, Firewall, Google Cloud Platform, Infrastructure Security, Cloud Security, Network Troubleshooting, Identity and Access Management
Intermediate · Course · 1 - 3 Months