Its FREE!!! Until the end of October 2022 if you do not pass an exam written in October you can
Category: Free
![](/wp-content/uploads/2020/07/icsi-cnss-618x400.png)
Free Certified Network Security Specialist
This course provides a holistic view of modern network security including operating system hardening, firewalls, intrusion-detection systems, VPNs and Encryption.