JN0-335: Juniper Security Specialist (JNCIS-SEC) Prep exams

The Security, Specialist (JNCIS-SEC) certification (JN0-335) is an intermediate-level Juniper Networks certification designed for security professionals, network engineers, and IT administrators who manage and secure Juniper SRX Series firewalls and other Junos-based security solutions. This course aligns with the official JN0-335 exam objectives and builds upon the foundational knowledge gained in JNCIA-SEC (JN0-231), preparing you to handle advanced security operations in enterprise and service provider environments.

This certification validates your expertise in SRX firewall configuration, security policies, NAT, VPNs, intrusion prevention, and application security. It is an essential credential for professionals seeking to advance into senior roles in network security engineering or SOC operations.

Key topics include:

• Advanced SRX configuration: deploying security zones, interfaces, and complex policy sets

• Security policies & UTM features: configuring rules for traffic control, antivirus scanning, web filtering, and content security

• NAT techniques: source NAT, destination NAT, static NAT, and proxy ARP

• IPsec VPN configuration: implementing site-to-site and remote-access VPNs with authentication and encryption

• Intrusion Detection & Prevention (IDP): designing, tuning, and monitoring IDP policies

• Application security & threat prevention: controlling applications, blocking malicious traffic, and mitigating attacks

• High availability (HA) security: clustering SRX devices for redundancy and failover

• Monitoring & troubleshooting: diagnosing security issues using Junos CLI, packet captures, and logging tools

The course includes practice tests simulating real-world security scenarios, such as deploying encrypted tunnels, mitigating denial-of-service attacks, and optimizing firewall policies. Detailed explanations follow each question to strengthen conceptual understanding and technical accuracy.

By completing this course, you’ll be fully prepared to pass the JNCIS-SEC exam (JN0-335) and ready for roles such as Network Security Engineer, SOC Analyst, Firewall Administrator, or Cybersecurity Specialist, enabling you to secure, monitor, and manage Juniper-powered environments effectively.