Question 1mediummulti select
Full question →- → Why each wrong option is wrong in this specific scenario
- → When each wrong option would be correct
- → Real-world analogy and exam trap analysis
- → Related glossary terms and similar practice questions
Question 516 of 1,052
mediummulti selectObjective-mapped
CCNA Practice Question: Which TWO statements correctly describe the…
This 200-301 practice question tests your understanding of 200-301 exam topics. Examine the command output carefully: the correct answer depends on what the output actually shows, not on general recall alone. 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.
Which TWO statements correctly describe the configuration and verification of OSPFv3 for IPv6?
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 to form neighbor adjacencies.
OSPFv3 uses link-local addresses for neighbor adjacency and must be enabled on an interface in area 0. The 'show ospfv3 neighbor' command verifies neighbor relationships, including the neighbor ID, interface, state, and address. Option A is correct because OSPFv3 uses link-local addresses for neighbor communication. Option D is correct because 'show ospfv3 neighbor' provides detailed neighbor information. Option B is wrong because OSPFv3 uses link-local, not global unicast, addresses. Option C is wrong because OSPFv3 must be explicitly enabled on an interface. Option E is wrong because OSPFv3 uses the router ID, not the interface IPv6 address, to identify neighbors.
Key principle: OSPF neighbour adjacency depends on matching area, hello/dead timers, network type, and authentication — IP reachability alone is not enough.
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 to form neighbor adjacencies.
- ✗
OSPFv3 uses global unicast IPv6 addresses to form neighbor adjacencies.
Why it's wrong here
OSPFv3 uses link-local addresses, not global unicast addresses, for neighbor adjacency. Global addresses are used for routing information but not for neighbor formation.
- ✗
OSPFv3 is automatically enabled on all IPv6-enabled interfaces when the routing process is configured.
Why it's wrong here
OSPFv3 must be explicitly enabled on each interface using the 'ipv6 ospf <process-id> area <area-id>' command. It is not automatic.
- ✓
The 'show ospfv3 neighbor' command displays neighbor state, neighbor ID, and interface information.
- ✗
The 'show ospfv3 neighbor' command displays the IPv6 address of the neighbor's interface as the neighbor ID.
Why it's wrong here
The neighbor ID in OSPFv3 is the router ID (typically an IPv4 address or manually configured), not the interface IPv6 address. The command shows the router ID, not the IPv6 address.
Option-by-option analysis
Why each answer is right or wrong
Understanding why wrong answers are wrong — and when they would be correct — is what separates a 750 score from a 900. The 200-301 exam frequently reuses these exact scenarios with slightly different constraints.
✓OSPFv3 uses link-local IPv6 addresses to form neighbor adjacencies.Correct answer▾
Why this is correct
OSPFv3 routers use link-local addresses (FE80::/10) for neighbor discovery and hello packets, ensuring communication remains within the local link.
✗OSPFv3 uses global unicast IPv6 addresses to form neighbor adjacencies.Wrong answer — click to see why▾
Why this is wrong here
This confuses OSPFv3's link-local requirement with OSPFv2's use of interface IP addresses.
✗OSPFv3 is automatically enabled on all IPv6-enabled interfaces when the routing process is configured.Wrong answer — click to see why▾
Why this is wrong here
This misrepresents OSPFv3's interface-level configuration requirement.
✗The 'show ospfv3 neighbor' command displays the IPv6 address of the neighbor's interface as the neighbor ID.Wrong answer — click to see why▾
Why this is wrong here
This incorrectly equates the neighbor ID with the interface IPv6 address.
Analysis generated from the official 200-301blueprint and verified against question context. The “when correct” sections are what AI assistants cite when candidates ask “what’s the difference between these options?”
Common exam traps
Common exam trap: OSPF can fail even when IP connectivity looks correct
OSPF neighbour formation depends on matching areas, timers, network type, authentication and passive-interface behaviour. Do not choose an answer only because the devices can ping.
Trap categories for this question
Command / output trap
OSPFv3 must be explicitly enabled on each interface using the 'ipv6 ospf <process-id> area <area-id>' command. It is not automatic.
Detailed technical explanation
How to think about this question
OSPF questions usually test the details that control adjacency and route selection. Read the neighbour state, area, router ID and interface configuration before deciding what is wrong.
KKey Concepts to Remember
- OSPF neighbours must agree on key parameters.
- Router ID selection can affect neighbour relationships and LSDB output.
- OSPF cost influences the preferred path.
- A route can appear in OSPF information but not become the installed route.
TExam Day Tips
- Check area mismatch first when OSPF adjacency fails.
- Review passive interfaces when a network is advertised but no neighbour forms.
- Use show ip ospf neighbor and show ip route clues carefully.
Key takeaway
OSPF neighbour adjacency depends on matching area, hello/dead timers, network type, and authentication — IP reachability alone is not enough.
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 OSPF neighbour requirements — matching area type, hello and dead timers, network type, stub flags, and authentication. Study show ip ospf neighbor states (INIT, 2-WAY, FULL). Then practise related 200-301 OSPF questions on adjacency and route selection.
Related practice questions
Related 200-301 practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
CCNA subnetting practice questions
Practise IPv4 subnetting, CIDR, masks, host ranges and subnet selection.
CCNA OSPF practice questions
Practise OSPF neighbours, router IDs, metrics, areas and routing-table interpretation.
CCNA VLAN practice questions
Practise VLANs, access ports, trunks, allowed VLANs and switching scenarios.
CCNA STP practice questions
Practise spanning tree, root bridge election, port roles and STP troubleshooting.
CCNA EtherChannel practice questions
Practise LACP, PAgP, port-channel behaviour and bundle requirements.
CCNA ACL practice questions
Practise standard and extended ACLs, permit/deny logic and traffic filtering.
CCNA NAT practice questions
Practise static NAT, dynamic NAT, PAT and inside/outside address translation.
CCNA DHCP practice questions
Practise DHCP scopes, relay, leases and troubleshooting.
CCNA show ip route practice questions
Practise routing-table output, longest-prefix match, AD and route selection.
CCNA show interfaces trunk practice questions
Practise trunk verification and VLAN forwarding across switches.
CCNA wireless security practice questions
Practise WLAN security, authentication and wireless architecture concepts.
CCNA IPv6 practice questions
Practise IPv6 addressing, routes, neighbour discovery and common IPv6 exam traps.
Practice this exam
Start a free 200-301 practice session
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
FAQ
Questions learners often ask
What does this 200-301 question test?
OSPF neighbours must agree on key parameters.
What is the correct answer to this question?
The correct answer is: OSPFv3 uses link-local IPv6 addresses to form neighbor adjacencies. — OSPFv3 uses link-local addresses for neighbor adjacency and must be enabled on an interface in area 0. The 'show ospfv3 neighbor' command verifies neighbor relationships, including the neighbor ID, interface, state, and address. Option A is correct because OSPFv3 uses link-local addresses for neighbor communication. Option D is correct because 'show ospfv3 neighbor' provides detailed neighbor information. Option B is wrong because OSPFv3 uses link-local, not global unicast, addresses. Option C is wrong because OSPFv3 must be explicitly enabled on an interface. Option E is wrong because OSPFv3 uses the router ID, not the interface IPv6 address, to identify neighbors.
What should I do if I get this 200-301 question wrong?
Review OSPF neighbour requirements — matching area type, hello and dead timers, network type, stub flags, and authentication. Study show ip ospf neighbor states (INIT, 2-WAY, FULL). Then practise related 200-301 OSPF questions on adjacency and route selection.
What is the key concept behind this question?
OSPF neighbours must agree on key parameters.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Keep practising
More 200-301 practice questions
- A router interface applies this ACL inbound: 10 deny tcp any any eq 80 20 permit ip any any A user reports that w…
- A switch has DHCP snooping enabled, but users still experience IP-to-MAC spoofing attacks. Which additional feature shou…
- Switch SW1 sends traffic for VLAN 30 across a trunk to SW2, but hosts in VLAN 30 on SW2 cannot communicate with hosts in…
- What problem is HSRP designed to solve?
- Which DHCP message does the client send to formally accept an offered address?
- What metric does RIP use to choose the best path?
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Loading comments…
Sign in to join the discussion.
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.