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Juniper JN0-690 Exam Syllabus Topics:

Juniper Junos Troubleshooting Sample Questions:

1. Click the Exhibit button.
-- Exhibit -user@host> request system software add ... WARNING: The /var filesystem is low on free disk space. WARNING: This package requires 1 k free, but there WARNING: is only 666502k available. -- Exhibit -
Which three commands are useful in identifying and addressing the cause of the lack of disk space? (Choose three.)

A) show chassis routing-engine
B) show system storage
C) show system directory-usage
D) request system software add validate
E) request system storage cleanup

2. 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 request system storage cleanup 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) Use file delete or the shell subsystem to remove files from the /var/tmp directory.
E) Enter the shell subsystem and issue the rm -rf /junos command.

3. In Junos, which process has its own internal task scheduler?

A) mgd
B) chassisd
C) rpd
D) ppmd

4. Click the Exhibit button.
-- Exhibit -
user@router> show configuration system services | display inheritance
ssh;
telnet;
-- Exhibit --
Referring to the exhibit, which two statements are true? (Choose two.)

A) Inbound FTP connections to the router would work.
B) Outbound FTP connections initiated from the router would not work.
C) Outbound FTP connections initiated from the router would work.
D) Inbound FTP connections to the router would not work.

5. An interface on your Junos device reports a device-level flag of Loopback-detected.
What is causing this flag to be reported?

A) The link-layer protocol failed to successfully connect with the remote endpoint.
B) The interface link layer received its own frames.
C) The interface was administratively disabled.
D) The interface is in promiscuous mode and sees frames addressed to all physical addresses on the medium.

Solutions: