JNCIA-SEC Srx Series Service Gateways Practice Question
Which TWO actions occur during packet processing when an SRX Series device operates in packet-based (stateless) mode rather than flow-based (stateful) mode? (Choose two)
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Firewall filters (ACLs) are evaluated for traffic filtering instead of security policies.
Switching an SRX to packet-based mode disables the security processing engine's stateful inspection, causing the device to act similarly to a traditional router using firewall filters.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Network Address Translation (NAT) continues to operate normally using security NAT rules.
Why it's wrong here
Security NAT is a flow-based feature; packet-based mode does not process security NAT rules.
- ✓
Firewall filters (ACLs) are evaluated for traffic filtering instead of security policies.
Why this is correct
In packet-based mode, security policies are bypassed, and Junos firewall filters handle traffic filtering.
- ✗
Security sessions are created in the session table to track TCP and UDP connections.
Why it's wrong here
Session table creation is a characteristic of flow-based mode, not packet-based mode.
- ✗
Application-level gateways (ALGs) inspect FTP and SIP traffic streams dynamically.
Why it's wrong here
ALGs are part of the stateful security services engine, which is inactive in packet-based mode.
- ✓
Screen options (DoS protection) are disabled because they require session state tracking.
Why this is correct
Screen options depend on flow-based state inspection and are not active in packet-based mode.
About these practice questions
One of 513 original JNCIA-SEC practice questions on Courseiva, each with a full explanation and wrong-answer analysis — not exam dumps or protected exam content. Learn why practice questions differ from exam dumps →
JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official Juniper Networks exam blueprint
This JNCIA-SEC practice question is part of Courseiva's free Juniper Networks certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the JNCIA-SEC exam.