Purchase Juniper : JN0-690 Exam Materials and then pass exam easily
Updated: May 28, 2026
No. of Questions: 70 Questions & Answers with Testing Engine
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Juniper Junos Troubleshooting Sample Questions:
1. 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 and apply this policy to IBGP.
B) Create a next-hop-self import policy on R1 and apply this policy to EBGP.
C) Create a next-hop-self import policy on R2 and apply this policy to IBGP.
D) Create a next-hop-self export policy on R1 and apply this policy to IBGP.
2. 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
3. Which two statements are true about firewall filters and policers? (Choose two.)
A) If an output firewall filter is configured on the same logical interface as a policer, the policer is executed first.
B) If an output firewall filter is configured on the same logical interface as a policer, the firewall filter is executed first.
C) If an input firewall filter is configured on the same logical interface as a policer, the policer is executed first.
D) If an input firewall filter is configured on the same logical interface as a policer, the firewall filter is executed first.
4. You have been asked to troubleshoot an interface that is flapping.
Which three tools would you use to isolate the cause? (Choose three.)
A) loopback interface testing
B) syslog messages
C) show interfaces
D) PFE statistics
E) ping utility
5. Click the Exhibit button.
-- Exhibit -=================== Bootstrap installer starting =================== Initialized the environment Routing engine model is RE-S-1800x4 Discovered that flash disk = ad0 , hard disk = ad1 mount: /dev/ad1s1f : Invalid argument ERROR: mount_partition: Mount /dev/ad1s1a /mnt failed You are now in a debugging subshell (you may not see a prompt)... # -- Exhibit -
During the boot of your MX480, you see the output shown in the exhibit. Which three statements are true? (Choose three.)
A) You must swap the Routing Engine over to the backup slot to get it to boot properly.
B) The Routing Engine cannot mount the partition to complete booting.
C) The boot failed because a USB drive has been inserted into the device.
D) The boot failed because one of the file systems is in an inconsistent state.
E) Running fsck on the partition might resolve the boot problem.
Solutions:
| Question # 1 Answer: D | Question # 2 Answer: C | Question # 3 Answer: B,C | Question # 4 Answer: A,B,C | Question # 5 Answer: B,D,E |
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