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Juniper JN0-690 Exam Syllabus Topics:

Juniper Junos Troubleshooting Sample Questions:

Question 1

Which command is useful in testing the correct operation of an SNMP configuration toward an NMS?

A. show snmp rmon
B. show snmp mib
C. show snmp v3
D. request snmp spoof-trap

Question 2

Which two statements are true about firewall filters and policers? (Choose two.)

A. If an input firewall filter is configured on the same logical interface as a policer, the policer is executed first.
B. If an input firewall filter is configured on the same logical interface as a policer, the firewall filter is executed first.
C. If an output firewall filter is configured on the same logical interface as a policer, the policer is executed first.
D. If an output firewall filter is configured on the same logical interface as a policer, the firewall filter is executed first.

Question 3

Click the Exhibit button.
-- Exhibit -user@R1> show route forwarding-table destination 2.2.2.2
user@R1> show route 2.2.2.2
inet.0: 10 destinations, 10 routes (10 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both
2.2.2.2/32 *[OSPF/10] 2w3d 22:19:41, metric 1 > to 17.1.1.2 via xe-1/1/0.0
-- Exhibit -
Referring to the exhibit, which statement is true about transit traffic sent to 2.2.2.2?

A. R1 will redirect the packet to the Routing Engine.
B. R1 will discard the packet.
C. R1 will reject the packet.
D. R1 will forward the packet.

Question 4

Click the Exhibit button.
-- Exhibit -user@R1> show pfe statistics traffic Packet Forwarding Engine traffic statistics:
Input packets: 47593914461368 2 pps Output packets: 28805646 3 pps Packet Forwarding Engine local traffic statistics: Local packets input : 36278104324
Local packets output : 2
Software input control plane drops : 0
Software input high drops : 0
Software input medium drops : 0
Software input low drops : 0
Software output drops : 0
Hardware input drops : 191367536738 Packet Forwarding Engine local protocol statistics:
HDLC keepalives : 0
ATM OAM : 0
Frame Relay LMI : 0
PPP LCP/NCP : 0
OSPF hello : 3883169
OSPF3 hello : 0
RSVP hello : 1440704
LDP hello : 4782297
BFD : 0
IS-IS IIH : 0
LACP : 0
ARP : 765512
ETHER OAM : 0
Unknown : 1897610 Packet Forwarding Engine hardware discard statistics:
Timeout : 0
Truncated key : 0
Bits to test : 0
Data error : 0 Stack underflow : 0 Stack overflow : 0 Normal discard : 191367536738 Extended discard : 0 Invalid interface : 0 Info cell drops : 191367536738 Fabric drops : 191367536738
Packet Forwarding Engine Input IPv4 Header Checksum Error and Output MTU Error statistics: Input Checksum : 0 Output MTU : 0
-- Exhibit -
Referring to the exhibit, which counter indicates a possible denial of service attack?

A. hardware input drops
B. normal discard
C. info cell drops
D. fabric drops

Question 5

Which three statements are true about performing an ISSU on a Junos device? (Choose three.)

A. ksyncd synchronizes the kernel on the backup RE with the master RE.
B. Any unsupported PICs will cause the ISSU process to fail with "Error: incompatible hardware detected."
C. The master RE verifies disk space on both REs, unsupported configurations, and unsupported PICs.
D. Every PFE on each FPC downloads the new software from the backup RE.
E. The backup RE verifies disk space on both REs, unsupported configurations, and unsupported PICs.

Solutions: