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350-401 Practice Question: Examine the following configuration for a Cisco…
Examine the following configuration for a Cisco IOS-XE device:
interface GigabitEthernet0/0 ip address 10.0.0.1 255.255.255.252
ipv6 address 2001:db8::1/64 ipv6 ospf 1 area 0 !
interface GigabitEthernet0/1 ip address 192.168.1.1 255.255.255.0
ipv6 address 2001:db8:1::1/64 ipv6 ospf 1 area 0 ! ipv6 router ospf 1 router-id 2.2.2.2
Which statement is true about OSPFv3 operation?
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 form adjacencies over both interfaces using link-local addresses.
OSPFv3 runs per interface and uses link-local addresses for neighbor discovery. The router-id is required and must be unique. Both interfaces are in area 0.
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 form adjacencies over both interfaces using the configured IPv6 addresses.
Why it's wrong here
Incorrect. OSPFv3 uses link-local addresses for adjacencies, not the global unicast addresses configured.
- ✓
OSPFv3 will form adjacencies over both interfaces using link-local addresses.
Why this is correct
Correct. OSPFv3 always uses link-local addresses for neighbor communication. The global addresses are used for routing.
- ✗
OSPFv3 will only run on GigabitEthernet0/0 because the router-id is not configured for GigabitEthernet0/1.
Why it's wrong here
Incorrect. The router-id is a global OSPFv3 parameter, not per-interface.
- ✗
OSPFv3 requires an explicit network command under the OSPFv3 process to enable on interfaces.
Why it's wrong here
Incorrect. OSPFv3 is enabled directly on the interface with 'ipv6 ospf' command; there is no network command in OSPFv3.
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 350-401 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 350-401 exam.