JN0-690 試験問題を無料オンラインアクセス

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.Issue the request system software delete-backup command.
• C.Enter the shell subsystem and issue the rm -rf /junos command.
• D.Use file delete or the shell subsystem to remove files from the /var/tmp directory.
• E.Issue the request system storage cleanup command.

Which three statements are correct about rpd related troubleshooting on devices running the Junos OS? (Choose three.)

• A.Excessive protocol tracing can never be a cause for an overworked rpd.
• B.A log for rpd scheduler slip is an indication of something that should be investigated and resolved.
• C.A possible method to troubleshoot rpd scheduler slips is to temporarily enable task accounting.
• D.A log for rpd scheduler slip is a common, harmless syslog and can be ignored.
• E.A possible cause for an overworked rpd is excessive protocol tracing.

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 interfaces controller
• D.show chassis alarms

Which two features would be deployed to prevent DoS attacks? (Choose two.)

• A.Bidirectional Forward Detection (BFD)
• B.periodic packet management (PPM)
• C.loopback filter
• D.ARP policer

You are notified about a router reboot event.
Which command would be helpful in determining the reason for the last reboot?

• A.show chassis routing-engine
• B.show system reboot
• C.show chassis craft-interface
• D.show system snapshot