The RedHat's Linux Networking Security Administration Certification is designed for the Linux administrators who require networking and security administration skills. This certification enhances the candidate's automation skills to securely configure, deploy and manage network services including DNS, Apache, SMTP, and network file sharing. You have to pass RH255 exam to get this certification.
The candidates should have completed RHCSA Rapid Track Course (RH200) or Red Hat System Administration I & II and have equivalent experience to the RHCSA Rapid Track Course before taking this certification. If you want to know more about this certification, please visit the Red Hat System Administration III with RHCSA and RHCE certification page.