350-501 Networking Practice Question
A service provider uses OSPFv3 for IPv6 routing in the core. Which statement correctly describes OSPFv3 adjacency formation on a broadcast multiaccess network?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The Designated Router (DR) is elected to reduce the number of adjacencies and LSDB flooding.
OSPFv3 operates similarly to OSPFv2 on broadcast networks, electing a DR and BDR using Hello protocol, and forming adjacencies with the DR.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
OSPFv3 does not use DR/BDR election; instead, it forms full mesh adjacencies.
Why it's wrong here
OSPFv3 uses DR/BDR on broadcast.
- ✗
All routers on the network form full adjacencies with every other router.
Why it's wrong here
Only DR/BDR form full adjacencies with all.
- ✗
The DR is elected based on the highest router ID, with a tiebreaker of highest interface priority.
Why it's wrong here
Highest priority wins, then highest RID.
- ✓
The Designated Router (DR) is elected to reduce the number of adjacencies and LSDB flooding.
Why this is correct
DR/BDR reduce O(n^2) to O(n).
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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