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Juniper JN0-690 Exam Braindumps - in .pdf Free Demo

  • Exam Code: JN0-690
  • Exam Name: Junos Troubleshooting
  • Last Updated: Aug 27, 2026
  • Q & A: 70 Questions and Answers
  • Convenient, easy to study. Printable Juniper JN0-690 PDF Format. It is an electronic file format regardless of the operating system platform. 100% Money Back Guarantee.
  • PDF Price: $49.99    

Juniper JN0-690 Exam Braindumps - Testing Engine PC Screenshot

  • Exam Code: JN0-690
  • Exam Name: Junos Troubleshooting
  • Last Updated: Aug 27, 2026
  • Q & A: 70 Questions and Answers
  • Uses the World Class JN0-690 Testing Engine. Free updates for one year. Real JN0-690 exam questions with answers. Install on multiple computers for self-paced, at-your-convenience training.
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Juniper JN0-690 Exam Syllabus Topics:

SectionObjectives
Topic 1: VPN and Service Troubleshooting- IPsec VPN issues
  • 1. Encryption and negotiation problems
    • 2. Tunnel establishment failures
      Topic 2: Layer 3 Routing Troubleshooting- OSPF and IS-IS troubleshooting
      • 1. Route calculation and convergence problems
        • 2. Adjacency and neighbor formation issues
          - BGP troubleshooting
          • 1. Session establishment and policy issues
            • 2. Route advertisement and filtering problems
              Topic 3: Troubleshooting Methodology and Tools- Junos operational commands (ping, traceroute, monitor traffic)
              • 1. Using CLI troubleshooting utilities
                • 2. Interpreting system logs and alarms
                  Topic 4: Layer 2 and Switching Troubleshooting- VLAN and bridging issues
                  • 1. MAC address learning and forwarding issues
                    • 2. STP and switching loops
                      Topic 5: Routing Policy and Firewall Filters- Policy evaluation and debugging
                      • 1. Route acceptance and rejection behavior
                        • 2. Firewall filter troubleshooting
                          Topic 6: System Operations and Device Health- Chassis and hardware status
                          • 1. Resource utilization and system performance
                            • 2. Interface errors and statistics analysis

                              Juniper Junos Troubleshooting Sample Questions:

                              Question 1

                              What controls the CLI process?

                              A. management daemon
                              B. chassis control daemon
                              C. device control daemon
                              D. routing protocol process


                              Question 2

                              Which command would be used to clear stuck user sessions?

                              A. request routing-engine login other-routing-engine
                              B. request system reboot
                              C. request chassis routing-engine master switch
                              D. request system logout


                              Question 3

                              Which command would be helpful in determining the time at which the protocols started?

                              A. show route
                              B. show system uptime
                              C. show chassis hardware
                              D. show configuration


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


                              Question 5

                              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. Enter the shell subsystem and issue the rm -rf /junos command.
                              B. Issue the request system software delete-backup command.
                              C. Issue the rollback 0 command to clear the unneeded configurations on the router.
                              D. Issue the request system storage cleanup command.
                              E. Use file delete or the shell subsystem to remove files from the /var/tmp directory.


                              Solutions:

                              Question 1
                              Answer: A
                              Question 2
                              Answer: D
                              Question 3
                              Answer: B
                              Question 4
                              Answer: B
                              Question 5
                              Answer: B,D,E

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