JNCIA-SEC Monitoring And Troubleshooting Practice Question
An administrator suspects that asymmetric routing is disrupting traffic flow through an SRX Series device. Which THREE symptoms or diagnostic indicators point toward asymmetric routing? (Choose three)
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
✓
Flow traceoptions show drops with reasons such as "No session found" or reverse path validation failures.
Asymmetric routing causes session creation failures, reverse flow mismatches, and specific flow trace drop messages.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The chassis cluster fails over immediately.
Why it's wrong here
Asymmetric routing does not trigger cluster failovers by itself.
- ✓
Flow traceoptions show drops with reasons such as "No session found" or reverse path validation failures.
Why this is correct
Trace logs will explicitly highlight when return packets do not match the expected session state.
- ✗
CPU utilization on the Routing Engine spikes to 100%.
Why it's wrong here
Asymmetric routing affects packet forwarding in the SPU/PFE, not necessarily causing RE CPU spikes.
- ✓
TCP sessions remain stuck in 'SynSent' because the SYN-ACK is routed through a different path bypassing the security device.
Why this is correct
Missing the reverse handshake packet prevents the session from transitioning to 'Established'.
- ✓
Packets entering on one interface attempt to exit or create sessions that violate zone or interface pairing expectations.
Why this is correct
Asymmetry means inbound and outbound paths cross different interfaces/devices unexpectedly.
Quick reference
Asymmetric Encryption Algorithm Comparison
| Algorithm | Key Exchange | Signatures | Equivalent Security Key | Notes |
|---|---|---|---|---|
| RSA-3072 | Yes | Yes | 128-bit | Widely deployed; slow for bulk data |
| ECDSA P-256 | No | Yes | 128-bit | Fast signatures; standard TLS certs |
| ECDH / ECDHE | Yes | No | 128-bit | Perfect forward secrecy in TLS 1.3 |
| DH / DHE | Yes | No | 128-bit (3072-bit key) | Replaced by ECDHE in modern TLS |
| Ed25519 | No | Yes | ~128-bit | SSH keys, modern PKI |
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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.