350-501 Networking Practice Question
In OSPFv3, which statement correctly describes how OSPFv3 differs from OSPFv2 regarding router IDs and adjacencies?
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
✓
OSPFv3 uses a 32-bit Router ID independent of IPv6 addresses.
OSPFv3 uses a 32-bit Router ID independent of IPv6 addresses. Adjacencies are formed with Router IDs, not link-local addresses. OSPFv3 runs per-link rather than per-subnet.
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 uses a 32-bit Router ID independent of IPv6 addresses.
Why this is correct
Correct. Router ID is 32-bit and must be configured or derived from an IPv4 address.
- ✗
OSPFv3 uses the same LSA types as OSPFv2.
Why it's wrong here
OSPFv3 has modified LSA types (e.g., Link LSA, Intra-Area Prefix LSA).
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OSPFv3 requires both IPv4 and IPv6 addresses on interfaces.
Why it's wrong here
OSPFv3 is for IPv6 only; no IPv4 needed.
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OSPFv3 uses IPv6 addresses to form adjacencies.
Why it's wrong here
Adjacencies are formed using Router IDs and link-local addresses are used for packets.
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