Juniper JN0-690 Q&A - in .pdf

  • Exam Code: JN0-690
  • Exam Name: Junos Troubleshooting
  • Updated: Oct 09, 2026
  • Q & A: 70 Questions and Answers
  • PDF Price: $49.99
  • Printable Juniper JN0-690 PDF Format. It is an electronic file format regardless of the operating system platform.
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Juniper JN0-690 Q&A - Testing Engine

  • Exam Code: JN0-690
  • Exam Name: Junos Troubleshooting
  • Updated: Oct 09, 2026
  • Q & A: 70 Questions and Answers
  • Install on multiple computers for self-paced, at-your-convenience training.
  • PC Test Engine Price: $49.99
  • Testing Engine

Juniper JN0-690 Value Pack (Frequently Bought Together)

CPR Online Test Engine
  • If you purchase Juniper JN0-690 Value Pack, you will also own the free online test engine.
  • PDF Version + PC Test Engine + Online Test Engine
  • Value Pack Total: $99.98  $69.99
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About Juniper Junos Troubleshooting - JN0-690 Exam Actual Tests

A study bundle only helps when it mirrors the real thing, and the Juniper Junos Troubleshooting materials at Prep4sureGuide recreate the JN0-690 exam's format and timing so your practice sessions feel like rehearsal, not guesswork.

Juniper JN0-690 Exam Overview:

Certification Vendor:Juniper Networks
Exam Name:Junos Troubleshooting
Exam Number:JN0-690
Related Certifications:JNCIS-SEC
JNCIP-SEC
JNCIA-Junos
Certificate Validity Period:3 Years
Real Exam Qty:70
Exam Price:$200–$300 USD
Passing Score:65-70%
Exam Format:Fill in the Blank, Drag and Drop, Multiple Choice
Exam Duration:90 minutes
Available Languages:English
Recommended Training:Junos Troubleshooting (EDU-JUN-IJS)
Introduction to Junos Operating System
Exam Registration:Pearson VUE Registration
Sample Questions:Free Download JN0-690 Actual tests
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:

SectionWeightObjectives
Data Plane & Interfaces Troubleshooting20%- Forwarding table & packet flow analysis
- Interface configuration, status & errors
- CoS, filters & policer issues
Troubleshooting Methodology & Tools15%- Logging, monitoring & packet capture tools
- Junos CLI commands & diagnostic utilities
- Systematic troubleshooting approach
Layer 2 & Layer 3 Protocol Troubleshooting15%- OSPF, BGP, IS-IS & RIP
- VRRP, BFD & high availability protocols
- Ethernet, VLAN, STP & LACP
Chassis & Hardware Troubleshooting15%- Power, cooling & FPC/PIC issues
- Boot process & system startup problems
- Hardware components & status monitoring
Control Plane Troubleshooting20%- Control plane protection & DDoS mitigation
- Protocol control messages & routing tables
- Routing Engine operations & health
High Availability & Network Services15%- DHCP, DNS, NTP & authentication services
- Chassis cluster & redundancy groups
- Graceful restart & non-stop routing

JN0-690 Exam Details, Version Policy and Customer Perks

Use the official registration channel: Pearson VUE Registration Create an account, choose between a test center and online proctoring, pick your date, and pay the exam fee to confirm.
Two ways. First, the IT staff checks JN0-690 update information every day, and the Juniper Junos Troubleshooting bank on the website is always the current version — if a vendor refresh is ever pending, the team tells you honestly and suggests waiting rather than selling you material that is about to change. Second, you can verify it yourself: download the free demo and compare it against any other version you have seen. That transparency is policy at Prep4sureGuide, not marketing.
Loyalty pays at Prep4sureGuide. After your JN0-690 purchase you receive priority access to holiday discounts and sale coupons. Pass your exam and come back for another subject, and a discount applies to that order too. Companies buying for teams get multi-year arrangements — free updates through the first year and fifty percent off from the second year onward.
Junos Troubleshooting (EDU-JUN-IJS) Introduction to Junos Operating System Many candidates combine an official course for structured theory with the verified Prep4sureGuide question bank for realistic timed rehearsal.
You will face about 70 questions in 90 minutes minutes. The Prep4sureGuide practice engine mirrors that format and timing, and working through 70 practice questions for the JN0-690 exam makes the real session feel familiar rather than rushed.
Because the fundamentals are solid: 70+ Q&As covering the Juniper Junos Troubleshooting objectives with verified answers, a bank checked daily and sold only in its latest version, support that answers within two hours around the clock, strict privacy protection, and loyalty savings for customers who return. Add the conditional refund policy and the JN0-690 purchase becomes a low-risk, high-support decision.
Recommended: JNCIA-Junos certification or equivalent knowledge; working experience with Junos OS
Passing requires 65-70%, and a seat costs $200–$300 USD. That fee is due again on every retake, so thorough preparation with verified Prep4sureGuide material is the sensible investment.
The official Juniper Junos Troubleshooting outline assigns its weights like this:
  • Troubleshooting Methodology & Tools (15%)
  • Chassis & Hardware Troubleshooting (15%)
  • Data Plane & Interfaces Troubleshooting (20%)
Budget your hours according to those weights and test each domain with the Prep4sureGuide bank before exam day.

Juniper Junos Troubleshooting Sample Questions:

Question #1

Which CLI command applies the candidate configuration to the active configuration?

  • A. copy run start
  • B. merge
  • C. load
  • D. commit
Reveal Solution  Discussion  0

Correct Answer: D  🗳️

Explanation: Only visible for Prep4sureGuide members. You can sign-up / login (it's free).

Question #2

Click the Exhibit button.
-- Exhibit -
Slot 0 information: State Online Total CPU DRAM ---- CPU less FPC ---Start time 2012-07-07 03:21:00 UTC Uptime 27 minutes, 51 seconds Slot 1 information: State Present Reason --- Hardware Not In Right Slot --Slot 2 information: State Online Total CPU DRAM 32 MB Start time 2012-07-07 03:20:59 UTC Uptime 27 minutes, 52 seconds Slot 3 information: State Present Reason --- Hardware Not Supported --Total CPU DRAM 0 MB Slot 6 information: State Online Total CPU DRAM 32 MB Start time 2012-07-07 03:21:01 UTC Uptime 27 minutes, 50 seconds
-- Exhibit -
Referring to the exhibit, which three statements are true? (Choose three.)

  • A. The Flexible PIC Concentrator (FPC) in slot 6 is online and working.
  • B. The Flexible PIC Concentrator (FPC) in slot 1 is not installed properly for this chassis.
  • C. The Control Board in slot 0 has a missing CPU.
  • D. The Control Board in slot 6 is online and working.
  • E. The card in slot 3 is not supported by the chassis.
Reveal Solution  Discussion  0

Correct Answer: A,B,E  🗳️

Question #3

What controls the CLI process?

  • A. management daemon
  • B. chassis control daemon
  • C. device control daemon
  • D. routing protocol process
Reveal Solution  Discussion  0

Correct Answer: A  🗳️

Question #4

-- Exhibit -
[edit]
user@router# show interfaces
ge-1/1/2 {
gigether-options {
802.3ad ae0;
}
}
ge-1/1/3 {
gigether-options {
802.3ad ae0;
}
}
ae0 {
unit 0 {
family bridge {
interface-mode trunk;
vlan-id-list 100;
}
}
}
-- Exhibit -
You are asked to configure a LAG. You configure and commit the configuration as shown in the exhibit. When verifying your ae0 interface, you encounter the following error:
[edit] user@router# run show interfaces ae0 error: device ae0 not found
Which command would you use to resolve this problem?

  • A. set interfaces ae0 aggregated-ether-options lacp active
  • B. set chassis alarm ethernet link-down ignore
  • C. set chassis aggregated-devices ethernet device-count 1
  • D. set chassis network-services ethernet
Reveal Solution  Discussion  0

Correct Answer: C  🗳️

Question #5

-- Exhibit -[edit] user@R1# run show interfaces ge-1/1/2 terse Interface Admin Link Proto Local Remote ge-1/1/2 up up ge-1/1/2.0 up up aenet --> ae0.0
[edit] user@R1# run show interfaces ge-1/1/3 terse Interface Admin Link Proto Local Remote ge-1/1/3 up up ge-1/1/3.0 up up aenet --> ae0.0
[edit]
user@R1# run show interfaces ae0 terse
Interface Admin Link Proto Local Remote
ae0 up down
ae0.0 up down bridge
[edit]
user@R1# show interfaces ae0
aggregated-ether-options {
lacp {
periodic slow;
system-priority 200;
}
}
unit 0 {
family bridge {
interface-mode trunk;
vlan-id-list 100;
}
}
**************************************************************************
[edit]
user@R2# run show interfaces ge-1/1/2 terse
Interface Admin Link Proto Local Remote
ge-1/1/2 up up
ge-1/1/2.0 up up aenet --> ae0.0
[edit]
user@R2# run show interfaces ge-1/1/3 terse
Interface Admin Link Proto Local Remote
ge-1/1/3 up up
ge-1/1/3.0 up up aenet --> ae0.0
[edit]
user@R2# run show interfaces ae0 terse
Interface Admin Link Proto Local Remote
ae0 up down
ae0.0 up down bridge
[edit]
user@R2# show interfaces ae0
aggregated-ether-options {
lacp {
periodic fast;
system-priority 100;
}
}
unit 0 {
family bridge {
interface-mode trunk;
vlan-id-list 100;
}
}
-- Exhibit --
You have configured a LAG and are now enabling LACP on the ae0 interface. You have configured and committed the configuration as shown in the exhibit. However, the exhibit also shows that the ae0 interface is now in the up/down state.
What must you do to resolve this problem?

  • A. Configure R1's LACP configuration as active.
  • B. Configure R2's LACP configuration as passive.
  • C. Configure both routers' ae0 LACP configuration to periodic fast.
  • D. Change the LACP system-priority of R1 to 300.
Reveal Solution  Discussion  0

Correct Answer: A  🗳️

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