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Juniper JN0-690 Exam Syllabus Topics:

Juniper Junos Troubleshooting Sample Questions:

Question 1

Which two commands help to identify traffic drops due to oversubscription? (Choose two.)

A. monitor interface traffic
B. monitor traffic interface
C. show interfaces queue
D. show interfaces extensive

Question 2

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 export policy on R1 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 import policy and apply this policy to IBGP.

Question 3

Click the Exhibit button.
-- Exhibit -user@R1> show configuration interfaces xe-1/1/0 {
unit 0 { family inet {
address 17.1.1.1/24;
}
family mpls;
}
}
user@R1> ping 17.1.1.2 size 1473 do-not-fragment
PING 17.1.1.2 (17.1.1.2): 1473 data bytes
ping: sendto: Message too long
ping: sendto: Message too long
ping: sendto: Message too long
user@R1> ping 17.1.1.2 logical-system R1 size 1472 do-not-fragment
PING 17.1.1.2 (17.1.1.2): 1472 data bytes
1480 bytes from 17.1.1.2: icmp_seq=0 ttl=64 time=0.933 ms
1480 bytes from 17.1.1.2: icmp_seq=1 ttl=64 time=0.838 ms
1480 bytes from 17.1.1.2: icmp_seq=2 ttl=64 time=4.688 ms
-- Exhibit --
You are using the ping command to troubleshoot a suspected MTU problem.

A. The first ping fails because the Junos OS takes into account Layer 2 headers while calculating the MTU.
B. The first ping fails because the Junos OS takes into account ICMP and IP headers while calculating the MTU.
C. The first ping fails because the Junos OS takes into account the CRC header while calculating the MTU.
D. Referring to the exhibit, which two statements are true? (Choose two.) The first ping fails because the do-not-fragment option is set.

Question 4

Which statement is correct about troubleshooting?

A. You must always have a complete understanding of the problem before you begin gathering any information.
B. Establishing a network baseline is important to help understand when something is not working.
C. You must be sure the problem will be resolved before attempting a potential solution.
D. The problem must be reproducible before attempting a potential solution.

Question 5

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

Solutions: