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Question 64 - JN0-351 discussion

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Referring to the exhibit, which two configuration changes must you apply for packets to reach from R1 to R3 using IS-IS? (Choose two.)

A.
On R1, enable Level 1 on the ge-0/0/1 interface.
Answers
A.
On R1, enable Level 1 on the ge-0/0/1 interface.
B.
On R3 disable Level 2 on the ge-0/0/4 interface.
Answers
B.
On R3 disable Level 2 on the ge-0/0/4 interface.
C.
On R1, disable Level 2 on the ge-0/0/1 interface.
Answers
C.
On R1, disable Level 2 on the ge-0/0/1 interface.
D.
On R3 enable Level 1 on the ge-0/0/4 interface
Answers
D.
On R3 enable Level 1 on the ge-0/0/4 interface
Suggested answer: A, D

Explanation:

A) On R1, enable Level 1 on the ge-0/0/1 interface.In IS-IS, both levels (Level 1 and Level 2) are enabled by default when you enable IS-IS on an interface1.Level 1 systems route within an area2.If the destination is outside an area, Level 1 systems route toward a Level 2 system2. Therefore, enabling Level 1 on the ge-0/0/1 interface on R1 would allow packets to reach from R1 to R3.

D) On R3 enable Level 1 on the ge-0/0/4 interfaceSimilarly, enabling Level 1 on the ge-0/0/4 interface on R3 would allow packets to reach from R1 to R3.

These explanations are based on the IS-IS configuration documents and learning resources available at Juniper Networks1and Cisco34.

asked 18/09/2024
Oren Dahan
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