Purchase Juniper : JN0-690 Exam Materials and then pass exam easily
Updated: Sep 16, 2026
No. of Questions: 70 Questions & Answers with Testing Engine
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Juniper JN0-690 Exam Overview:
| Certification Vendor: | Juniper Networks |
|---|---|
| Exam Name: | Junos Troubleshooting |
| Exam Number: | JN0-690 |
| Passing Score: | 65-70% |
| Certificate Validity Period: | 3 Years |
| Exam Price: | $200–$300 USD |
| Available Languages: | English |
| Exam Duration: | 90 minutes |
| Real Exam Qty: | 70 |
| Related Certifications: | JNCIA-Junos JNCIP-SEC JNCIS-SEC |
| Exam Format: | Multiple Choice, Fill in the Blank, Drag and Drop |
| Recommended Training: | Introduction to Junos Operating System Junos Troubleshooting (EDU-JUN-IJS) |
| Exam Registration: | Pearson VUE Registration |
| Sample Questions: | Juniper JN0-690 Sample Questions |
| Exam Way: | In-person at Pearson VUE test centers; retired April 30, 2015, replaced by JN0-691 |
| Pre Condition: | Recommended: JNCIA-Junos certification or equivalent knowledge; working experience with Junos OS |
| Official Syllabus URL: | https://www.juniper.net/us/en/training/certification.html |
Juniper JN0-690 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Control Plane Troubleshooting | 20% | - Routing Engine operations & health - Control plane protection & DDoS mitigation - Protocol control messages & routing tables |
| Data Plane & Interfaces Troubleshooting | 20% | - Forwarding table & packet flow analysis - CoS, filters & policer issues - Interface configuration, status & errors |
| Troubleshooting Methodology & Tools | 15% | - Junos CLI commands & diagnostic utilities - Systematic troubleshooting approach - Logging, monitoring & packet capture tools |
| Chassis & Hardware Troubleshooting | 15% | - Power, cooling & FPC/PIC issues - Hardware components & status monitoring - Boot process & system startup problems |
| High Availability & Network Services | 15% | - Chassis cluster & redundancy groups - DHCP, DNS, NTP & authentication services - Graceful restart & non-stop routing |
| Layer 2 & Layer 3 Protocol Troubleshooting | 15% | - OSPF, BGP, IS-IS & RIP - Ethernet, VLAN, STP & LACP - VRRP, BFD & high availability protocols |
Juniper Junos Troubleshooting Sample Questions:
Which three statements are correct about rpd related troubleshooting on devices running the Junos OS? (Choose three.)
- A. Excessive protocol tracing can never be a cause for an overworked rpd.
- B. A log for rpd scheduler slip is an indication of something that should be investigated and resolved.
- C. A possible cause for an overworked rpd is excessive protocol tracing.
- D. A log for rpd scheduler slip is a common, harmless syslog and can be ignored.
- E. A possible method to troubleshoot rpd scheduler slips is to temporarily enable task accounting.
Correct Answer: B,C,E 🗳️
Which three statements are correct about ARP related troubleshooting? (Choose three.)
- A. There are no default ARP policers on any devices running the Junos OS.
- B. The monitor traffic interface <interface-name> command can be used to watch ARP packets.
- C. The clear arp command also clears the IPv6 neighbor cache.
- D. An individual ARP entry can be cleared using the clear arp hostname command.
- E. Most devices that run the Junos OS allow you to specify a manual ARP entry.
Correct Answer: B,D,E 🗳️
Which CLI command applies the candidate configuration to the active configuration?
- A. copy run start
- B. load
- C. merge
- D. commit
Correct Answer: D 🗳️
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Which operational CLI command would you use to display information about the system and software processes?
- A. show cli
- B. show route
- C. show chassis
- D. show system
Correct Answer: D 🗳️
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Which command is useful in testing the correct operation of an SNMP configuration toward an NMS?
- A. show snmp mib
- B. show snmp rmon
- C. request snmp spoof-trap
- D. show snmp v3
Correct Answer: C 🗳️
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