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Juniper JN0-690 Exam Syllabus Topics:

Juniper Junos Troubleshooting Sample Questions:

Question 1

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

Question 2

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

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

Question 3

Which two statements are correct about the show ospf route and the show route protocols ospf commands? (Choose two.)

A. show route protocols ospf displays the route entries in the routing table that were learned through OSPF.
B. show route protocols ospf displays the entries in the Open Shortest Path First (OSPF) routing table.
C. show ospf route displays the route entries in the routing table that were learned through OSPF.
D. show ospf route displays the entries in the Open Shortest Path First (OSPF) routing table.

Question 4

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

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

Question 5

What is the name of the routing protocol process on a Junos OS device?

A. rpd
B. cosd
C. snmpd
D. chassisd

Solutions: