- A
ipv6 ospf 1 area 0: Enables OSPFv3 on an interface in area 0
The Router ID uniquely identifies a router in OSPFv3. It is a 32-bit value, typically derived from the highest loopback IP address or manually configured.
- B
router-id: Sets the router ID for OSPFv3 process
This is incorrect because the Link State ID identifies a specific LSA, not a router. It is used to distinguish between multiple LSAs of the same type.
- C
show ipv6 ospf neighbor: Displays OSPFv3 neighbor adjacencies
This is incorrect because the Intra-Area-Prefix LSA carries prefixes within an area, not the router identifier. It is used to advertise IPv6 prefixes inside an area.
- D
ipv6 router ospf 1: Enters OSPFv3 router configuration mode
This is incorrect because the AS-External LSA carries external routes redistributed into OSPF, not the router identifier. It is used to advertise routes from other routing domains.
Quick Answer
The answer is that the command "ipv6 router ospf 1" correctly enters OSPFv3 router configuration mode. This is because OSPFv3, unlike its IPv4 counterpart, uses the "ipv6 router ospf" command followed by a process ID to initiate the routing process for IPv6, directly enabling the configuration of OSPFv3-specific parameters like the Router ID, Link State ID, and Interface ID. On the CCNA 200-301 v2 exam, this appears as a drag-and-drop task where you must match OSPFv3 commands and terms to their descriptions, testing your ability to distinguish between configuration modes and OSPFv3’s unique terminology—a common trap is confusing "ipv6 router ospf" with the older "router ospf" used for IPv4. Remember that OSPFv3 always requires the "ipv6" prefix to activate, and a memory tip is to think "IPv6 needs its own OSPF key" to recall the full command syntax.
CCNA IP Routing Practice Question
This 200-301 practice question tests your understanding of ip routing. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
Drag and drop the OSPFv3 commands/terms on the left to the correct descriptions on the right.
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
ipv6 ospf 1 area 0: Enables OSPFv3 on an interface in area 0
These commands and terms are accurately paired with their OSPFv3 descriptions as per Cisco IOS.
Key principle: Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
ipv6 ospf 1 area 0: Enables OSPFv3 on an interface in area 0
Why this is correct
The Router ID uniquely identifies a router in OSPFv3. It is a 32-bit value, typically derived from the highest loopback IP address or manually configured.
Related concept
Authentication checks who the user is.
- ✓
router-id: Sets the router ID for OSPFv3 process
Why this is correct
This is incorrect because the Link State ID identifies a specific LSA, not a router. It is used to distinguish between multiple LSAs of the same type.
Related concept
Authentication checks who the user is.
- ✓
show ipv6 ospf neighbor: Displays OSPFv3 neighbor adjacencies
Why this is correct
This is incorrect because the Intra-Area-Prefix LSA carries prefixes within an area, not the router identifier. It is used to advertise IPv6 prefixes inside an area.
Related concept
Authentication checks who the user is.
- ✓
ipv6 router ospf 1: Enters OSPFv3 router configuration mode
Common exam traps
Common exam trap: authentication is not authorization
Logging in proves the user can authenticate. It does not automatically mean the user is allowed to enter privileged or configuration mode. Watch for AAA authorization, privilege level and command authorization details.
Detailed technical explanation
How to think about this question
This kind of question is testing the difference between identity and permission. A user may successfully log in to a router because authentication is working, but still fail to enter configuration mode because authorization is missing, misconfigured or mapped to a lower privilege level.
KKey Concepts to Remember
- Authentication checks who the user is.
- Authorization controls what the user is allowed to do after login.
- Privilege levels affect access to EXEC and configuration commands.
- AAA, TACACS+ and RADIUS can separate login success from command access.
TExam Day Tips
- Do not assume successful login means full administrative access.
- Look for words such as cannot enter configuration mode, privilege level, authorization or command access.
- Separate login problems from permission problems before choosing the answer.
Key takeaway
Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.
Real-world example
How this comes up in practice
A network engineer at a university connects two campus buildings via a fibre link. Both routers run OSPF, but no adjacency forms — even though both routers can ping each other. The engineer finds one router is in area 0 and the other in area 1. OSPF adjacency requires matching area numbers, hello/dead timers, and network type. IP reachability alone is not enough.
What to study next
Got this wrong? Here's your next step.
Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related 200-301 questions on access control and AAA configuration.
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IP Routing — study guide chapter
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FAQ
Questions learners often ask
What does this 200-301 question test?
IP Routing — This question tests IP Routing — Authentication checks who the user is..
What is the correct answer to this question?
The correct answer is: ipv6 ospf 1 area 0: Enables OSPFv3 on an interface in area 0 — These commands and terms are accurately paired with their OSPFv3 descriptions as per Cisco IOS.
What should I do if I get this 200-301 question wrong?
Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related 200-301 questions on access control and AAA configuration.
What is the key concept behind this question?
Authentication checks who the user is.
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Last reviewed: Jun 6, 2026
This 200-301 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 200-301 exam.
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