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Router R3 receives an LSA with the sequence number 111 from router R4 and then receives another copy of the LSA with a sequence number 112 from router R2. What does router R3 do with the LSA from R2?
Suggested Answer: C
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10 comments · newest first
RO
Rosina
12 months ago
Yep, R3 just keeps the latest LSA for accuracy!
AS
Ashlyn
12 months ago
Just to clarify, R3 sends an ACK to R2, right?
AV
Avery
12 months ago
Wait, are we sure about that? I thought R3 might install it instead.
BE
Belen
1 year ago
Totally agree, sequence numbers matter!
MA
Marilynn
1 year ago
R3 will discard the LSA from R2 since it has a lower sequence number.
ST
Stephaine
1 year ago
I feel like R3 would send an ACK to R2 if it discards the LSA, but I can't recall if that's the right choice here.
MI
Mitsue
1 year ago
I remember a practice question where the router installed the LSA if it was newer, so maybe R3 installs the one from R2?
TR
Truman
1 year ago
I think R3 should discard the LSA from R2 since it already has a newer one from R4, but I'm not entirely sure.
SH
Shantay
1 year ago
I’m leaning towards option D because it seems like R3 should acknowledge and flood the new LSA, but I need to double-check the sequence number rules.
CH
Cheryl
1 year ago
Incremental backup is the way to go on this type of question. I've seen it come up before on exams.