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Juniper JN0-690 Exam Syllabus Topics:

Juniper Junos Troubleshooting Sample Questions:

Question 1

Which three statements are correct about ARP related troubleshooting? (Choose three.)

A. The monitor traffic interface <interface-name> command can be used to watch ARP packets.
B. An individual ARP entry can be cleared using the clear arp hostname command.
C. There are no default ARP policers on any devices running the Junos OS.
D. The clear arp command also clears the IPv6 neighbor cache.
E. Most devices that run the Junos OS allow you to specify a manual ARP entry.

Question 2

Which operational command would be used to display diagnostic data and alarms for 1/10/100 Gigabit Ethernet optical transceivers?

A. show interfaces diagnostics optics
B. show interfaces extensive
C. show chassis alarms
D. show interfaces controller

Question 3

Which two statements are true regarding BGP path MTU discovery? (Choose two.)

A. BGP path MTU discovery must be configured on every router along the path.
B. BGP path MTU discovery alleviates fragmentation problems.
C. BGP path MTU discovery can be enabled only for IBGP sessions.
D. BGP path MTU discovery provides the most efficient use of link bandwidth.

Question 4

Click the Exhibit button.
-- Exhibit -user@router> show chassis environment
Class Item Status Measurement Power Power Supply A OK Power Supply B Absent
Temp FPC 0 OK 28 degrees C / 82 degrees F FPC 1 OK 27 degrees C / 80 degrees F Power Supply A OK 22 degrees C / 71 degrees F Power Supply B Absent SSB 0 OK 30 degrees C / 86 degrees F Backplane OK 22 degrees C / 71 degrees F Routing Engine 0 OK 26 degrees C / 78 degrees F Routing Engine 1 Testing
Fans Rear Fan OK Spinning at normal speed Front Upper Fan OK Spinning at normal speed Front Middle Fan OK Spinning at normal speed Front Bottom Fan OK Spinning at normal speed
Misc Craft Interface OK -- Exhibit -
Referring to the exhibit, which two statements are true about the chassis? (Choose two.)

A. Power Supply B is not installed in the system.
B. Routing Engine 1 is installed in the system but is still initializing.
C. Routing Engine 1 has failed.
D. Power Supply B is installed in the system but has failed.

Question 5

Given the example shown below:
Emergency boot media > flash disk > _____
What is missing from the default boot list?

A. PCMCIA card
B. USB
C. LAN
D. hard disk

Solutions: