JNCIA-SEC Srx Series Service Gateways Practice Question
You are troubleshooting an interface on an SRX Series device that is dropping frames due to cyclic redundancy check (CRC) errors. Which operational command helps identify physical layer framing issues?
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
✓
show interfaces extensive
The command 'show interfaces extensive' provides deep operational statistics, including error counters such as framing errors, drops, and CRC errors.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
show system statistics
Why it's wrong here
System statistics show IP/TCP/UDP stack counters, not physical interface layer errors.
- ✗
show chassis alarms
Why it's wrong here
Chassis alarms show major/minor hardware faults, not detailed per-interface CRC counters.
- ✗
show security monitoring status
Why it's wrong here
This command checks security service monitoring, not physical layer framing errors.
- ✓
show interfaces extensive
Why this is correct
This command displays detailed error counters including CRC, framing, and input/output drops for physical interfaces.
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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.