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300-410 Practice Question: Consider this OSPFv3 configuration on router R2:…
Consider this OSPFv3 configuration on router R2:
ipv6 router ospf 10 router-id 2.2.2.2
area 0 authentication ipsec spi 256 md5 1234567890abcdef1234567890abcdef interface GigabitEthernet0/0
ipv6 address 2001:db8:1::1/64 ipv6 ospf 10 area 0
What is the effect of this configuration?
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 will use IPsec MD5 authentication for all packets in area 0, including on GigabitEthernet0/0.
The area authentication command under OSPFv3 enables IPsec authentication for the entire area. The interface is enabled for OSPFv3 in area 0, so it will use the area authentication. However, OSPFv3 authentication uses IPsec AH or ESP; the configuration shown is valid.
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 will use IPsec MD5 authentication for all packets in area 0, including on GigabitEthernet0/0.
Why this is correct
Correct. The area authentication command applies to all interfaces in that area.
- ✗
Authentication is applied only to the GigabitEthernet0/0 interface, not the entire area.
Why it's wrong here
Incorrect. The area-level authentication applies to all interfaces in the area.
- ✗
The configuration is invalid because OSPFv3 does not support IPsec authentication.
Why it's wrong here
Incorrect. OSPFv3 supports IPsec authentication.
- ✗
The router-id is missing, so OSPFv3 will not start.
Why it's wrong here
Incorrect. The router-id is configured as 2.2.2.2.
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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JA
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.