The certification landscape shifts fast, and Juniper revises its exams without asking your schedule. Every JN0-690 purchase at Pass4suresVCE includes 365 days of free updates, keeping your 70 practice questions synchronized with the live Juniper Junos Troubleshooting throughout 2026.
Juniper JN0-690 Exam Overview:
| Certification Vendor: | Juniper Networks |
|---|---|
| Exam Name: | Junos Troubleshooting Specialist Exam (JN0-690) |
| Exam Number: | JN0-690 |
| Related Certifications: | Juniper Networks Certified Associate - Junos (JNCIA-Junos) Juniper Networks Certified Specialist - Enterprise Routing and Switching |
| Available Languages: | English |
| Exam Format: | Multiple choice, Scenario-based questions |
| Recommended Training: | Juniper Training Courses (Official) |
| Exam Registration: | Juniper Certification Portal Pearson VUE Juniper Exams |
| Sample Questions: |  |
| Exam Way: | Online proctored or test center delivery (Pearson VUE) |
| Pre Condition: | Recommended prior experience with Junos OS and routing fundamentals; Juniper associate-level knowledge (e.g., JNCIA-Junos) is typically expected. |
| Official Syllabus URL: | https://www.juniper.net/us/en/training/certification.html |
Juniper JN0-690 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Interface and Layer 2 Troubleshooting | - VLAN and switching issues - Interface status and error diagnosis |
| Layer 3 Routing Troubleshooting | - BGP troubleshooting - Static routing and route lookup issues - OSPF troubleshooting |
| System Monitoring and Diagnostics | - Performance and connectivity analysis tools - Logs, traces, and system alarms |
| Routing Policy and Filter Issues | - Policy application and route selection - Filter evaluation and debugging |
| Services and Protocol Troubleshooting | - VPN and tunnel troubleshooting - NAT and firewall filter behavior |
| Junos OS Fundamentals and Architecture | - Junos OS process architecture and components - System operation and maintenance basics |
Questions Candidates Ask About the Juniper Junos Troubleshooting
For the Juniper Junos Troubleshooting, Juniper points candidates toward these resources:
Training builds the foundation; deliberate practice builds the pass. Layer the 70 practice questions from Pass4suresVCE on top of any course above, and you cover theory and execution in one plan.
The Juniper Junos Troubleshooting blueprint spans 6 domains. The heaviest hitters include System Monitoring and Diagnostics, Layer 3 Routing Troubleshooting, and Junos OS Fundamentals and Architecture. The complete breakdown — every domain and subtopic — is laid out in the syllabus section above, and that is the map your study sessions should follow.
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Formally known as the Junos Troubleshooting, the JN0-690 exam is Juniper's way of certifying that you can apply its technologies to real-world problems — pass it, and you hold the Juniper Networks Certified Specialist (Junos Troubleshooting) certification, a Professional-level credential. Because it is vendor-backed and skills-driven, employers treat it as proof rather than promise. It also feeds into a wider path that includes Juniper Networks Certified Associate - Junos (JNCIA-Junos), Juniper Networks Certified Specialist - Enterprise Routing and Switching.
Book your Juniper Junos Troubleshooting seat through these official channels:
One practical note: the JN0-690 exam is delivered Online proctored or test center delivery (Pearson VUE), so factor that into which slot you choose.
There is — Pass4suresVCE publishes a free PDF demo of the JN0-690 materials, so you can verify the accuracy and relevance of the questions before committing a cent. Buying unlocks 365 days of free updates on top of the full question bank, and if your product ever expires, the update service renews at a 50% discount from your member zone.
Recommended prior experience with Junos OS and routing fundamentals; Juniper associate-level knowledge (e.g., JNCIA-Junos) is typically expected.
Requirements like these evolve, so before locking in an exam date, double-check the current rules on the official Juniper exam page.
Juniper Junos Troubleshooting Sample Questions:
Which two actions are required when performing a unified in-service software upgrade (ISSU)? (Choose two.)
- A. You must disable nonstop bridging (NSB) if the Layer 2 Control Protocol is in use.
- B. You must enable nonstop active routing (NSR).
- C. You must enable graceful Routing Engine switchover (GRES).
- D. You must disable graceful Routing Engine switchover (GRES) if the Layer 2 Control Protocol is in use.
Correct Answer: B,C 🗳️
You are asked to configure traceoptions to capture all general events for rpd.
Which configuration statement accomplishes this task?
- A. [edit routing-options]
user@router# show
traceoptions {
file rpd_log;
flag general;
} - B. [edit forwarding-options]
user@router# show
traceoptions {
file rpd_log;
flag general;
} - C. [edit protocols]
user@router# show
traceoptions {
file rpd_log;
flag general;
} - D. [edit routing-instances]
user@router# show
traceoptions {
file rpd_log;
flag general;
}
Correct Answer: A 🗳️
-- Exhibit -
user@router> show system switchover
Graceful switchover: On
Configuration databasE. Ready
Kernel databasE. Version incompatible
Peer statE. Steady State
-- Exhibit -
You have enabled graceful Routing Engine switchover (GRES). During verification, you switched mastership and all interfaces went down.
Referring to the output shown in the exhibit, why did the interfaces go down?
- A. The synchronization failed because the Junos OS version on the backup is incompatible with the version running on the master.
- B. The synchronization failed because the master Routing Engine cannot communicate with the backup Routing Engine.
- C. The synchronization failed because the Routing Engine models are different between the master and backup.
- D. The synchronization failed because the Junos OS version on the backup does not support GRES.
Correct Answer: A 🗳️
Click the Exhibit button.
-- Exhibit -root@router> show system storage Filesystem Size Used Avail Capacity Mounted on /dev/da0s1a 742M 741M -6.6M 101% /junos/cf devfs 1.0K 1.0K 0B 100% /dev devfs 1.0K 1.0K 0B 100% /dev/ /dev/md0 494M 494M 0B 100% /junos /cf 742M 741M -6.6M 101% /junos/cf devfs 1.0K 1.0K 0B 100% /junos/dev/ procfs 4.0K 4.0K 0B 100% /proc /dev/bo0s3e 24M 108K 22M 0% /config /dev/bo0s3f 342M 110M 205M 35% /cf/var /dev/md1 168M 14M 141M 9% /mfs /cf/var/jail 342M 110M 205M 35% /jail/var devfs 1.0K 1.0K 0B 100% /jail/dev /dev/md2 39M 4.0K 36M 0% /mfs/var/run/utm /dev/md3 1.8M 4.0K 1.7M 0% /jail/mfs -- Exhibit -
Your device running the Junos OS has become slow and you obtain frequent errors when you try to make changes.
Referring to the exhibit, which three actions would resolve the problem? (Choose three.)
- A. Use file delete or the shell subsystem to remove files from the /var/tmp directory.
- B. Issue the rollback 0 command to clear the unneeded configurations on the router.
- C. Issue the request system storage cleanup command.
- D. Issue the request system software delete-backup command.
- E. Enter the shell subsystem and issue the rm -rf /junos command.
Correct Answer: A,C,D 🗳️
Click the Exhibit button.
You recently added an EBGP neighbor to R1 and you are receiving a single BGP route for their internal network. You notice that on R2 the route learned from C1 is being marked as hidden because the next hop is unusable.
Referring to the exhibit, what should you do to resolve the problem?
- A. Create a next-hop-self import policy on R2 and apply this policy to IBGP.
- B. Create a next-hop-self export policy on R1 and apply this policy to IBGP.
- C. Create a next-hop-self import policy on R1 and apply this policy to EBGP.
- D. Create a next-hop-self import policy and apply this policy to IBGP.
Correct Answer: B 🗳️
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