JN0-106 User Interfaces Practice Question
A technician is troubleshooting a routing issue and needs to see real-time updates of BGP prefixes being received. Which command should be used?
⚠ Common exam trap
The trap here is that candidates familiar with Cisco IOS often expect a 'debug ip bgp updates' equivalent, but Junos uses 'monitor route bgp' for real-time BGP route updates, while 'monitor traffic' is for packet-level analysis, not routing protocol events.
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 route bgp
The 'monitor route bgp' command in Junos OS provides a real-time, continuously updated view of BGP routes as they are learned or withdrawn. Unlike static show commands, this monitor command refreshes the output dynamically, making it ideal for observing live BGP prefix updates during troubleshooting.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
monitor route bgp
Why this is correct
The 'monitor route bgp' command is the correct choice because it subscribes to the BGP Routing Information Base (RIB) and prints route add, change, and withdrawal events in real time. Unlike static show commands, it remains active until you stop it, making it the only option that provides continuous, dynamic monitoring of BGP route changes for live troubleshooting.
- ✗
monitor traffic interface ge-0/0/0
Why it's wrong here
The 'monitor traffic interface ge-0/0/0' command captures and displays raw packet headers or summaries passing through the specified interface. It analyzes Layer 2/3/4 packet-level traffic, not routing table or BGP route updates, so it cannot reveal route changes and is therefore incorrect for this task.
- ✗
show route advertising-protocol bgp
Why it's wrong here
The 'show route advertising-protocol bgp' command displays the routes that the local router advertises to a specific BGP neighbor, as a point-in-time snapshot. It does not monitor real-time changes and provides only outbound advertising information, not a general view of BGP route updates, making it unsuitable for ongoing troubleshooting.
- ✗
show route protocol bgp
Why it's wrong here
The 'show route protocol bgp' command shows the current contents of the BGP routing table at the exact moment the command is executed. It is a static snapshot that does not automatically refresh or track real-time route changes, so it cannot be used to monitor updates as they occur.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This JN0-106 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 JN0-106 exam.