JNCIA-SEC Monitoring And Troubleshooting Practice Question
You need to perform packet capture on an SRX Series device to analyze suspicious traffic hitting an interface. Which built-in Junos utility should you use?
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
✓
monitor traffic interface ge-0/0/0
Junos provides packet capture capabilities using the monitor traffic command.
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 security packet-capture interface
Why it's wrong here
This is an incorrect command syntax for packet capture.
- ✗
request diagnostic capture start
Why it's wrong here
Diagnostic capture commands are not standard Junos packet capture syntax.
- ✓
monitor traffic interface ge-0/0/0
Why this is correct
Correct. monitor traffic is the Junos equivalent of tcpdump, capturing packets passing through an interface.
- ✗
start shell tcpdump -i ge-0/0/0
Why it's wrong here
While UNIX shell tcpdump is available, monitor traffic is the preferred built-in Junos operational command without dropping to the shell.
About these practice questions
This JNCIA-SEC question is part of Courseiva's 513-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam dumps. 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.