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Which of the following best describes downstream on demand label distribution?
Suggested Answer: C
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27 comments · newest first
LI
Linn
10 months ago
Wait, I thought it was D? This is confusing!
YO
Yolande
10 months ago
B is just wrong, it doesn't fit the definition.
SL
Slyvia
11 months ago
C makes the most sense to me, no doubt about it.
CE
Ceola
11 months ago
I think A is more accurate, but C is close.
GI
Giuseppe
11 months ago
Definitely C, that's how it works!
LA
Lashawnda
11 months ago
I’m confused between A and C. A sounds like it’s more immediate, but C seems to fit the definition of on demand better.
ER
Erin
11 months ago
I practiced a similar question, and I feel like option B is about advertising to all peers, but that doesn't seem to fit the "on demand" part.
HE
Herman
12 months ago
I'm not entirely sure, but I remember something about LSRs needing to wait for next-hop mappings. That might relate to option D?
AL
Allene
12 months ago
I think downstream on demand means that the LSR only sends the label mapping when it's specifically requested, which sounds like option C.
WE
Weldon
1 year ago
I'm a bit confused by the wording of these options. Can someone clarify the differences between them? I want to make sure I have a solid understanding before selecting an answer.
GE
Gerri
1 year ago
Okay, I've read through the question a few times now. I think option A best describes downstream on-demand label distribution, where the LSR responds immediately to requests without waiting for the next-hop.
EM
Emerson
1 year ago
Hmm, this one seems a bit tricky. I'll need to think through the different options carefully to make sure I understand the nuances between them.
VA
Van
1 year ago
I'm pretty sure this is asking about how label distribution works in MPLS networks. I think the key is understanding the difference between downstream on-demand and unsolicited label distribution.
BE
Ben
1 year ago
I'm leaning towards D, as it seems more logical to wait for the next-hop.
JE
Jennifer
1 year ago
Wait, are we talking about labels on packages or something? I'm totally lost here.
LY
Lynda
1 year ago
This question is making my brain hurt. Labeling and mapping, oh my!
SE
Serita
1 year ago
B) An LSR advertises label mappings to all peers for which it might be a next-hop for a given FEC
ME
Melvin
1 year ago
A) An LSR answers requests for label mappings immediately, without waiting for a label mapping from the next-hop.
AV
Avery
1 year ago
But A makes more sense because it's immediate.
AD
Adelle
1 year ago
Hmm, I'm torn between B and C. Doesn't an LSR advertise label mappings to all its peers in downstream on-demand distribution?
LA
Lavera
1 year ago
I'd go with D. The LSR needs to have a label mapping for the next-hop before it can propagate the label downstream, right?
MA
Marg
1 year ago
Yes, you're correct. The LSR only propagates the label downstream if it has a label mapping for the next-hop.
VA
Valentin
1 year ago
I disagree, I believe it's C.
RO
Rolande
1 year ago
Definitely C. That's exactly what on-demand label distribution is all about - the LSR waits for a request before distributing the label mapping.
LA
Lashawna
1 year ago
Yeah, it makes sense for the LSR to distribute the label mapping only when requested.
DE
Delsie
1 year ago
I think C is the correct answer too.
AV
Avery
1 year ago
I think the answer is A.