You can enroll in either of the following network security certification programs:

1. CompTIA Security+    

https://partners.comptia.org/certifications/security

2. Systems Security Certified Practitioner (SSCP) by (ISC)²

https://www.isc2.org/certifications/sscp

3. Certified Information Systems Security Professional (CISSP) by (ISC)²

https://www.isc2.org/certifications/cissp

4. Cisco Certified Network Professional (CCNP)

https://www.cisco.com/site/us/en/learn/training-certifications/certifications/security/ccnp-security/index.html