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Question 29 - JN0-351 discussion

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You have two OSPF routers forming an adjacency. R1 has a priority of 32 and a router ID of 192.168.1.2. R2 has a priority of 64 and a router ID of 192.168.1.1. The routers were started at the same time and all other OSPF settings are the default settings.

Which statement is correct in this scenario?

A.
At least three routers are required for a DR/BDR election
Answers
A.
At least three routers are required for a DR/BDR election
B.
Router IDs must match for an adjacency to form.
Answers
B.
Router IDs must match for an adjacency to form.
C.
R2 will be the BDR.
Answers
C.
R2 will be the BDR.
D.
R1 will be the BDR.
Answers
D.
R1 will be the BDR.
Suggested answer: D

Explanation:

In OSPF, the Designated Router (DR) and Backup Designated Router (BDR) are elected based on the priority of the routers1.The router with the highest priority becomes the DR, and the router with the second highest priority becomes the BDR1.If there is a tie in priority, then the router with the highest Router ID is chosen1.

In this scenario, R2 has a higher priority (64) than R1 (32), so R2 will become the DR1.Since R1 has the second highest priority, it will become the BDR1. Therefore, option D is correct.

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asked 18/09/2024
Budi Gunawan
46 questions
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