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.

Cisco Learning and Certifications
Skills you'll gain: Wireless Networks, Network Security, Threat Management, Vulnerability Assessments, Vulnerability Scanning, Local Area Networks, Cybersecurity, Cyber Attacks, Authentications, Security Awareness, Enterprise Security, Network Protocols, Telecommunications, Encryption, Identity and Access Management, Cryptographic Protocols, Networking Hardware, System Configuration
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Data Centers, Network Security, Network Administration, Virtualization and Virtual Machines, Network Troubleshooting, Virtual Machines, Network Monitoring, Wide Area Networks, Virtualization, Wireless Networks, Firewall, Event Monitoring, Cloud Infrastructure, Hardening, IT Security Architecture, Network Infrastructure, Virtual Private Networks (VPN), TCP/IP, Cloud Computing, Information Technology Operations
★ 4.9 (13) · Advanced · Course · 1 - 3 Months

Skills you'll gain: Network Security, Intrusion Detection and Prevention, Command-Line Interface, Cybersecurity, IT Security Architecture, Information Systems Security, Local Area Networks, Cyber Attacks, Computer Security, Linux Commands, Windows PowerShell, Security Controls, Hardening, Vulnerability Scanning, Endpoint Security, Threat Detection, Linux, Network Architecture, Wireless Networks, Network Analysis
★ 4.4 (15) · Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Email Security, Cybersecurity, Malware Protection, Network Security, Application Security, Information Systems Security, Cyber Security Strategy, Authentications, Data Security, Risk Management, Security Controls, Multi-Factor Authentication, Security Software, Threat Management, Risk Management Framework, Cryptography, Endpoint Security, Firewall, Threat Detection, Operating Systems
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Vulnerability Assessments, Distributed Denial-Of-Service (DDoS) Attacks, Vulnerability Scanning, Vulnerability Management, Cybersecurity, Malware Protection, Penetration Testing, Cyber Threat Intelligence, Exploitation techniques, Threat Management, Brute-force attacks, Network Security, Information Systems Security, Security Awareness, Human Factors (Security), Authentications, Network Protocols
★ 4.7 (10) · Intermediate · Course · 1 - 3 Months

Skills you'll gain: Amazon Web Services, Distributed Denial-Of-Service (DDoS) Attacks, Infrastructure Security, Cloud Security, Network Security, Application Security, Firewall, Amazon Elastic Compute Cloud, Endpoint Security, Data Security, Security Controls, Network Monitoring
Intermediate · Course · 1 - 4 Weeks

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

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

Skills you'll gain: Distributed Denial-Of-Service (DDoS) Attacks, Virtual Private Networks (VPN), Network Security, Microsoft Azure, Network Routing, Cloud Security, Firewall, Virtual Networking, Wide Area Networks, Network Architecture, Network Troubleshooting, Network Monitoring, Cryptographic Protocols, Remote Access Systems, Security Controls, Event Monitoring, Encryption, Hybrid Cloud Computing
Intermediate · Course · 1 - 4 Weeks

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

Skills you'll gain: Routing Protocols, Network Security, Network Routing, Network Routers, TCP/IP, Network Administration, Open Shortest Path First (OSPF), Network Protocols, Network Switches, Virtual Local Area Network (VLAN), Network Monitoring, Firewall, Local Area Networks, Network Infrastructure, Network Troubleshooting, Network Performance Management, Security Controls, Virtual Networking, Network Analysis, Authentications
Intermediate · Course · 1 - 3 Months

Total Seminars
Skills you'll gain: Network Monitoring, Network Troubleshooting, Network Performance Management, Dynamic Host Configuration Protocol (DHCP), Network Protocols, Network Security, TCP/IP, Authentications, Identity and Access Management, Security Controls, Network Administration, Network Infrastructure, Email Security, Firewall, Cryptographic Protocols, File Transfer Protocol (FTP), Network Engineering, Single Sign-On (SSO), Network Model, Network Analysis
Intermediate · Course · 1 - 3 Months