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JN0-643 · Question #158

All four routers in the exhibit are in the same broadcast domain. The routers were powered on at the same time. [edit] user@R1# show routing-options router-id router-id 1.1.1.1; [edit] user@R1# show…

The correct answer is B. R2 is the DR and R3 is the BDR. See the full explanation below for the reasoning.

Question

All four routers in the exhibit are in the same broadcast domain. The routers were powered on at the same time. [edit] user@R1# show routing-options router-id router-id 1.1.1.1; [edit] user@R1# show protocols ospf area 0.0.0.0 { interface ge-0/0/7.0; } [edit] user@R2# show routing-options router-id router-id 2.2.2.2; [edit] user@R2# show protocols ospf area 0.0.0.0 { interface ge-0/0/8.0 { priority 200; } } [edit] user@R3# show routing-options router-id router-id 222.255.255.255; [edit] user@R3# show protocols ospf area 0.0.0.0 { interface ge-0/0/8.0; } [edit] user@R4# show routing-options router-id router-id 239.255.255.255; [edit] user@R4# show protocols ospf area 0.0.0.0 { interface ge-0/0/6.0 { priority 0; } } Based on the configurations, which devices are the DR and the BDR

Options

  • AR4 is the DR and R2 is the BDR.
  • BR2 is the DR and R3 is the BDR.
  • CR2 is the DR and R1 is the BDR.
  • DR3 is the DR and R2 is the BDR.

How the community answered

(28 responses)
  • A
    4% (1)
  • B
    82% (23)
  • C
    7% (2)
  • D
    7% (2)

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