An L1 router has formed an adjacency with an L1-L2 router.
Under which condition will the L1-L2 router set the attach bit in its Level 1 link-state PDUs?
A.
when the L1-L2 router forms an adjacency with another L1 router in the same area
B.
when the L1-L2 router forms an adjacency with an L2 router in the same area
C.
when the L1-L2 router forms an adjacency with an L2 router in a different area
D.
when the L1-L2 router forms an adjacency with an L1 router in a different area
Explanation:
L1 routers use L1/L2 routers as the next hop for the default route 0.0.0.0/0. The L1/L2 routers do not advertise
a default route—instead, the L1/L2 routers set the attached bit, which is advertised to the L1 router and causes
the L1 router to install a default route with the L1/L2 router as the next hop.
If an L1/L2 router does not have an L2 adjacency to a different area than its own, the L1/L2 router will not set
the attach bit, resulting in the L1 routers not installing a default route.
Network Scaling With Bgp Labeled Unicast, Design and Configuration Guide, page 8
Correct Answer: C
https://goo.gl/4vNCZB
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Hi, does anyone know if these questions are still valid?
Thank you!
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I have just passed with Score 83,the exam have 65 Q&A as dump 661
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Hi Dear
can you please update on the correct answers
JNO-661
Regards,
Asif Fazal
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Dear gents,
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Yes I passed..
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Congrats Raju. Is this dump is valid to pass JN0-102.
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Answer : C
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agree, C correct
https://www.juniper.net/documentation/en_US/junos/topics/concept/is-is-routing-overview.html
When a routing device that operates as both a Level 1 and Level 2 router (Router B) determines that it can reach at least one area other than its own (for example, in Area Y), it sets the ATTACHED bit in its Level 1 link-state PDU. Thereafter, the Level 1 router (Router A) introduces a default route pointing to the nearest attached routing device that operates as both a Level 1 and Level 2 router (Router B). See Figure 1.
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I passed the exam today with 90%. This site was very helpful to me. Thanks Guys.
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latest update on dumps
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are they still valid ?
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Option C, Final answer.
Though this question is testing on the use of attached-bit, it is also testing on the is-is adjacency formation.
simple rule:
A Level-1 router can form adjacency with another Level-1 or Level-1-2 router only, and a Level-2 router can form adjacency with a Level-2 or Level-1-2 router only.
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