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Juniper JN0-351 Exam - Topic 6 Question 9 Discussion

Actual exam question for Juniper's JN0-351 exam
Question #: 9
Topic #: 6
[All JN0-351 Questions]

After receiving a BGP route, which two conditions are verified by the receiving router to ensure that the received route is valid? (Choose two)

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Suggested Answer: B, C

Bis correct because the loops do not exist is one of the conditions that are verified by the receiving router to ensure that the received BGP route is valid.A loop in BGP means that a route has been advertised by the same AS more than once, which can cause routing instability and inefficiency1.To prevent loops, BGP uses the AS-path attribute, which lists the AS numbers that a route has traversed from the origin to the destination2.The receiving router checks the AS-path attribute of the received route and discards it if it finds its own AS number in the list2. This way, BGP avoids accepting routes that contain loops.

Cis correct because the next hop is reachable is one of the conditions that are verified by the receiving router to ensure that the received BGP route is valid.The next hop is the IP address of the next router that is used to forward packets to the destination network3.The receiving router checks the next hop attribute of the received route and verifies that it has a valid route to reach it3.If the next hop is not reachable, the received route is not usable and is rejected by the receiving router3. This way, BGP ensures that only feasible routes are accepted.


by Gilma at Dec 14, 2023, 10:34 PM

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Lizette
3 months ago
I thought the loops were handled by the protocol itself, not a manual check.
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Eden
3 months ago
Local preference > 0 is a must, no doubt!
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Amalia
3 months ago
Wait, do we really check for loops? I thought that was automatic.
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Crissy
4 months ago
Definitely agree on the AS-path length being > 0.
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Gerry
4 months ago
The next hop is reachable for sure!
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Nobuko
4 months ago
I feel like checking for loops is important, but I can't recall if it's specifically mentioned in the conditions.
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Anthony
4 months ago
I’m a bit confused about the local preference. Does it really need to be greater than 0 for the route to be valid?
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Melda
4 months ago
I think the next hop being reachable is definitely one of the conditions. I practiced a question like this last week!
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Adolph
5 months ago
I remember something about the AS-path, but I'm not sure if it has to be greater than 0 or if it's just checked for loops.
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Erick
5 months ago
I've got this! The two conditions are the AS-path length and the absence of routing loops. Easy peasy.
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Jina
5 months ago
The local preference being greater than 0 is an interesting one. I'll have to double-check that in my notes.
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Eden
5 months ago
Hmm, this seems straightforward. I'll need to check the AS-path length and look for any routing loops.
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Katy
5 months ago
Okay, I know the next hop has to be reachable, but I'm not sure about the other condition. Let me think this through.
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Jamey
5 months ago
Hmm, I'm a little unsure about this one. I'll need to double-check the steps to make sure I get the data labels right. Hopefully, I can figure it out.
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Shoshana
5 months ago
This looks like a straightforward multiple-choice question on the features of the Veritas eDiscovery Platform. I'll carefully read through the options and try to recall what I know about the platform's capabilities.
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Dell
5 months ago
I'm a bit confused on this one. I'll need to review my notes on the Multi-Org model to make sure I understand the different organization types and their impacts.
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