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Nokia 4A0-100 Exam - Question 43


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?

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Correct Answer: D

When a router receives an LSA with a higher sequence number, it means the LSA contains newer information. Router R3 will install the LSA with the higher sequence number (112) from R2 in its link state database, send an acknowledgment (ACK) to R2 to confirm receipt, and then flood a copy of the updated LSA to its neighbors. This ensures all routers in the network have the most up-to-date information. Hence, the correct action taken by router R3 is to install the LSA, send an ACK to R2, and flood the LSA to its neighbors.

Discussion

7 comments
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fshahOption: D
Aug 25, 2020

yes answer should be D As sequence number are different and was not installed

VjBotOption: D
Aug 24, 2020

Answer should be D

ah14680haOption: D
Aug 28, 2020

Answer should be D

cplstudyOption: D
Dec 24, 2020

D is the correct answer.

Moro71Option: D
May 16, 2021

D is the correct

Dream_HunterOption: C
Sep 28, 2021

C is correct! because it says "another copy of the LSA"

Yen_C
Dec 14, 2021

You should not discard the LSA with higher sequence number. The correct answer is D.

Shan_M
Dec 30, 2021

"C" will be the right answer, only if the sequence number received from router-B is 111; which isn't the case. Hence the correct answer is "D"

NayaPOption: D
Sep 29, 2022

Should be D