In the MA network, after the DR and BDR election is completed, if the BDR fails, the DRother will re-elect a new BDR until the original BDR returns to normal.

Question

Options

• ATRUE
• BFALSE
• C
• D

• A
  8% (3)
• B
  76% (29)
• C
  3% (1)
• D
  13% (5)

Explanation

B is correct because OSPF DR/BDR elections on Multi-Access networks are non-preemptive. When the BDR fails, a new BDR is elected from the DRother routers - but that newly elected BDR permanently holds the role. When the original BDR comes back online, it rejoins the network as a DRother, not as BDR, because it lost its role during the outage.

Why A is wrong: The statement falsely implies the new BDR election is a temporary placeholder arrangement "until the original BDR returns." OSPF does not work this way - there is no preemption mechanism that would restore the original BDR to its former role upon recovery.

Memory tip: Think of OSPF elections like a job promotion - once someone else is promoted into the role, the returning employee doesn't automatically get their old position back. "Non-preemptive" = no takeover, no return. If you see any exam statement suggesting a router reclaims DR or BDR status automatically after recovery, the answer is almost always FALSE.

No community discussion yet for this question.