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300-410 Practice Question: Which TWO statements about OSPFv3 (OSPF for IPv6)…
Which TWO statements about OSPFv3 (OSPF for IPv6) are true when comparing it to OSPFv2? (Choose TWO.)
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 link-local IPv6 addresses for neighbor discovery.
OSPFv3 runs on a per-link basis (not per-subnet) and uses link-local addresses for neighbor discovery. OSPFv3 still uses areas and LSAs, and authentication is handled by IPsec, not OSPF itself. OSPFv3 does not use the 'network' command; it uses 'ipv6 ospf' under the interface.
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 link-local IPv6 addresses for neighbor discovery.
Why this is correct
OSPFv3 routers form adjacencies using their link-local IPv6 addresses.
- ✗
OSPFv3 uses the same LSA types as OSPFv2.
Why it's wrong here
OSPFv3 has new LSA types (e.g., Link LSA, Intra-Area-Prefix LSA) and modified formats.
- ✗
OSPFv3 supports authentication using MD5 or SHA within the OSPF packet.
Why it's wrong here
OSPFv3 relies on IPsec for authentication, not built-in OSPF authentication.
- ✗
OSPFv3 uses the 'network' command to enable OSPF on interfaces.
Why it's wrong here
OSPFv3 enables OSPF per interface using 'ipv6 ospf <process-id> area <area-id>'.
- ✓
OSPFv3 operates on a per-link basis rather than per-IP-subnet.
Why this is correct
OSPFv3 is link-based, meaning it can run over multiple IPv6 subnets on the same link.
Visual reference
Quick reference
Routing Protocol Comparison
| Protocol | Metric | Max Hops | Algorithm | Type |
|---|---|---|---|---|
| RIP v2 | Hop count | 15 | Bellman-Ford | Distance vector |
| OSPF | Cost (bandwidth) | Unlimited | Dijkstra (SPF) | Link state |
| EIGRP | Composite metric | Unlimited | DUAL | Hybrid |
| IS-IS | Cost | Unlimited | Dijkstra | Link state |
| BGP | Policy / attributes | Unlimited | Path vector | Path vector |
RIP's 15-hop limit makes it unsuitable for large networks. OSPF and EIGRP dominate modern enterprise deployments.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 300-410 practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 300-410 exam.