JN0-690 Online Practice Questions and Answers

In the Junos OS, which type of file dumps the program's environment in the form of memory pointers, instructions, and register data to a file in the event of a panic or other serious malfunction?

A. log file

B. backup file

C. configuration file

D. core file

A technician has reported an alarm on your device running the Junos OS. You suspect it is due to the temperature in the rack. Which two commands will confirm your suspicion? (Choose two.)

A. show chassis alarms

B. show chassis firmware

C. show chassis hardware

D. show chassis environment

You are asked to provide an audit trail for all user activity on your Junos device. Which syslog configuration statement accomplishes this task?

A. user * {any any;}file messages {any notice;authorization info;}

B. user * {any any;}file messages {any info;authorization info;}

C. user * {any emergency;}file messages {any notice;authorization info;}file interactive-commands {interactive-commands any;}

D. user * {any emergency;}file messages {any notice;authorization info;}file audit-commands {authorization any;}

An OSPF neighbor is stuck in the Exchange state. Which condition would cause this to happen?

A. a mismatched area

B. mismatched authentication

C. a mismatched IP subnet

D. a mismatched MTU

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. Use file delete or the shell subsystem to remove files from the /var/tmp directory.

E. Issue the request system software delete-backup command.

Click the Exhibit button.

-- Exhibit -user@router> show system users 9:28PM up 2 days, 3:02, 2 users, load averages: 0.06, 0.13, 0.09 USER TTY FROM LOGIN@ IDLE WHAT lab u0 - 9:13PM - -cli (cli) admin p0 10.210.15.30 9:45PM - -cli (cli) -- Exhibit -Referring to the exhibit, which two statements are true? (Choose two.)

A. The admin user is connected through a console session.

B. The admin user is connected through a Telnet or SSH session.

C. Both user sessions will be cleared after issuing the command request system logout terminal.

D. The lab user's session will be cleared after issuing the command request system logout user lab.

Click the Exhibit button.

-- Exhibit -user@r2# run show route 100.1.1.0/24 detail

inet.0: 5 destinations, 5 routes (5 active, 0 holddown, 0 hidden) 100.1.1.0/24 (1 entry, 1 announced) *Static PreferencE. 5

Next hop typE. Reject

Address: 0x8f7b5a4

Next-hop reference count: 2

StatE.

Local AS: 65001

AgE. 59

Task: RT

Announcement bits (1): 2-KRT

AS path: 65005 I

user@r2# show protocols bgp

group ibgp {

type external;

export to-bgp;

neighbor 10.1.2.1 {

local-address 10.1.2.2;

family inet {

unicast;

}

family inet6 {

unicast;

}

peer-as 65005;

}

}

user@r2# run show bgp summary

Groups: 1 Peers: 1 Down peers: 0

Table Tot Paths Act Paths Suppressed History Damp State Pending inet6.0 0 0 0 0 0 0

inet.0

0 0 0 0 0 0

Peer AS InPkt OutPkt OutQ Flaps Last Up/Dwn State|#Active/Received/Accepted/Damped...

10.1.2.1 65005 31 31 0 0 12:08 Establ

inet6.0: 0/0/0/0

inet.0: 0/0/0/

user@r2# show policy-options

policy-statement to-bgp {

from protocol static;

then accept;

}

user@r2# run show route advertising-protocol bgp 10.1.2.1

[edit] user@r2# -- Exhibit -

Referring to the exhibit, router r2 does not advertise the static route to peer 10.1.2.1. What is the problem?

A. The export policy is incorrect.

B. The static route has Next hop typE. Reject.

C. The export policy should be applied under the [edit protocols bgp group ibgp neighbor 10.1.2.1] hierarchy.

D. An AS path loop is detected.

-- Exhibit -Local traffic capture on r1:

Address resolution is OFF.

Listening on ge-5/3/0.0, capture size 1514 bytes

22:16:33.610374 Out IP (tos 0xc0, ttl 1, id 34562, offset 0, flags [none], proto: OSPF (89), length: 76) 10.1.2.1 > 224.0.0.5: OSPFv2, Hello, length 56 [len 44]

Router-ID 1.1.1.1, Backbone Area, Authentication TypE. none (0) Options [External, LLS] Hello Timer 10s, Dead Timer 40s, Mask 255.255.255.252, Priority 128 LLS: checksum: 0xfff6, length: 3 Extended Options (1), length: 4

Options: 0x00000001 [LSDB resync]

[edit]

user@r1# run show ospf interface

Interface State Area DR ID BDR ID Nbrs

ge-5/3/0.0 PtToPt 0.0.0.0 0.0.0.0 0.0.0.0 0

lo0.1 DR 0.0.0.0 1.1.1.1 0.0.0.0 0

[edit]

user@r1# run show ospf neighbor

Local traffic capture on r2:

Address resolution is OFF.

Listening on ge-5/3/1.0, capture size 1514 bytes

22:16:42.238030 Out IP6 (class 0xc0, hlim 1, next-header: OSPF (89), length: 36) fe80::6687:88ff:fe6c:6769 > ff02::5: OSPFv3, Hello, length 36 Router-ID 2.2.2.2, Backbone Area Options [V6, External, Router]

Hello Timer 10s, Dead Timer 40s, Interface-ID 0.0.0.1, Priority 128 Neighbor List:

user@r2# run show ospf interface

OSPF instance is not running

-- Exhibit -

Click the Exhibit button.

Referring to the exhibit, routers r1 and r2 are connected to each other by interfaces ge-5/3/0 and ge- 5/3/1 respectively. They do not become OSPF neighbors.

Which two statements are true? (Choose two.)

A. r1 is configured for OSPFv3.

B. r1 is configured for OSPFv2.

C. r2 is configured for OSPFv2.

D. r2 is configured for OSPFv3.

Click the Exhibit button.

-- Exhibit -May 20 22:27:04.010297 OSPF rcvd Hello 192.168.0.2 -> 224.0.0.5 (ge-1/1/2.0 IFL 343 area 0.0.0.0) May 20 22:27:04.010320 Version 2, length 44, ID 10.10.10.1, area 0.0.0.1 May 20 22:27:04.010342 checksum 0x166d, authtype 0 May 20 22:27:04.010365 mask 255.255.255.252, hello_ivl 10, opts 0x12, prio 128 May 20 22:27:04.010387 dead_ivl 40, DR 192.168.0.2, BDR 0.0.0.0 May 20 22:27:07.891698 OSPF periodic xmit from 192.168.0.1 to 224.0.0.5 (IFL 2684276180 area 0.0.0.0) May 20 22:27:12.749988 OSPF packet ignored: area mismatch (0.0.0.1) from 192.168.0.2 on intf ge- 1/1/2.0 area 0.0.0.0 May 20 22:27:12.750071 OSPF rcvd Hello 192.168.0.2 -> 224.0.0.5 (ge-1/1/2.0 IFL 343 area 0.0.0.0) May 20 22:27:12.750095 Version 2, length 44, ID 10.10.10.1, area 0.0.0.1 May 20 22:27:12.750116 checksum 0x166d, authtype 0 May 20 22:27:12.750139 mask 255.255.255.252, hello_ivl 10, opts 0x12, prio 128 May 20 22:27:12.750161 dead_ivl 40, DR 192.168.0.2, BDR 0.0.0.0 May 20 22:27:14.393182 OSPF rcvd Hello 192.168.0.2 -> 224.0.0.5 (ge-1/1/2.0 IFL 343 area 0.0.0.0) May 20 22:27:14.393262 Version 2, length 44, ID 10.10.10.1, area 0.0.0.0 May 20 22:27:14.393284 checksum 0x0, authtype 0 May 20 22:27:14.393307 mask 255.255.255.252, hello_ivl 50, opts 0x12, prio 128 May 20 22:27:14.393368 dead_ivl 200, DR 0.0.0.0, BDR 0.0.0.0 May 20 22:27:14.393399 OSPF packet ignored: our router ID received from 192.168.0.2 on intf ge- 1/1/2.0 area 0.0.0.0 -- Exhibit -

Referring to the exhibit, which two OSPF adjacency problems are present? (Choose two.)

A. hello interval mismatch

B. duplicate router ID

C. area type mismatch

D. area number mismatch

-- 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 Junos OS version on the backup is incompatible with the version running on the master.

B. The synchronization failed because the Junos OS version on the backup does not support GRES.

C. The synchronization failed because the Routing Engine models are different between the master and backup.

D. The synchronization failed because the master Routing Engine cannot communicate with the backup Routing Engine.