Juniper JN0-691 問題集

質問 1：
Which two tools would be used to troubleshoot BGP peering problems? (Choose two.)
A. traceoptions
B. the monitor traffic interface command
C. the inet.3 routing table
D. the link-state database
正解：A,B

質問 2：
-- Exhibit -
user@router> show system switchover
Graceful switchover: On
Configuration databasE.Ready
Kernel databasE.Version incompatible
Peer statE.Steady State
-- Exhibit -
You have enabled graceful Routing Engine switchover (GRES). During verification, you switched mastership and all interfaces went down.
Referring to the output shown in the exhibit, why did the interfaces go down?
A. The synchronization failed because the Routing Engine models are different between the master and backup.
B. The synchronization failed because the master Routing Engine cannot communicate with the backup Routing Engine.
C. The synchronization failed because the Junos OS version on the backup does not support GRES.
D. The synchronization failed because the Junos OS version on the backup is incompatible with the version running on the master.
正解：D

質問 3：
Which chassis component on a Junos device serves as the brain of the device and maintains routing tables?
A. System Control Board
B. Network Processing Card
C. Routing Engine
D. Packet Forwarding Engine
正解：C

質問 4：
Which three statements are correct about rpd related troubleshooting on devices running the Junos OS? (Choose three.)
A. A possible cause for an overworked rpd is excessive protocol tracing.
B. Excessive protocol tracing can never be a cause for an overworked rpd.
C. A log for rpd scheduler slip is an indication of something that should be investigated and resolved.
D. A possible method to troubleshoot rpd scheduler slips is to temporarily enable task accounting.
E. A log for rpd scheduler slip is a common, harmless syslog and can be ignored.
正解：A,C,D

質問 5：
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 storage cleanup command.
C. Enter the shell subsystem and issue the rm -rf /junos command.
D. Issue the request system software delete-backup command.
E. Use file delete or the shell subsystem to remove files from the /var/tmp directory.
正解：B,D,E

質問 6：
Which two statements are true about nonstop active routing? (Choose two.)
A. You must enable graceful restart for nonstop active routing to function correctly.
B. Routing information is saved on the backup Routing Engine.
C. Routing information is not saved on the backup Routing Engine.
D. You must enable GRES for nonstop active routing to function correctly.
正解：B,D

質問 7：
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.
正解：D

質問 8：
You are notified about a router reboot event.
Which command would be helpful in determining the reason for the last reboot?
A. show system reboot
B. show system snapshot
C. show chassis craft-interface
D. show chassis routing-engine
正解：D