The correct answer is that the neighbor 10.1.1.5 is not receiving OSPF packets. This is determined because the neighbor state is DOWN, which in OSPF neighbor state troubleshooting directly indicates that no Hello packets have been received from that router, breaking the adjacency formation process. On the Certified Associate in Project Management CAPM exam, this scenario tests your ability to interpret OSPF state outputs and distinguish between common issues like misconfigured network types or ACLs versus incorrect router IDs or DR election problems. A frequent trap is assuming a DOWN state always means a physical link failure, but here the output shows other neighbors in FULL/DR and FULL/BDR states, proving the link is up and DR election completed—isolating the issue to packet reception on that specific neighbor. Remember the mnemonic: DOWN means no Hello heard, so check filters or mismatched parameters first.
CAPM Business Analysis Frameworks Practice Question
This CAPM practice question tests your understanding of business analysis frameworks. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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.
Exhibit
R1# show ip ospf neighbor
Neighbor ID Pri State Dead Time Address Interface
10.1.1.2 1 FULL/DR 00:00:36 192.168.1.2 GigabitEthernet0/0
10.1.1.3 1 2WAY/DROTHER 00:00:39 192.168.1.3 GigabitEthernet0/0
10.1.1.4 1 FULL/BDR 00:00:34 192.168.1.4 GigabitEthernet0/0
10.1.1.5 1 DOWN - 192.168.1.5 GigabitEthernet0/0
Refer to the exhibit. A BA is troubleshooting an OSPF network. What issue does the output indicate?
R1# show ip ospf neighbor
Neighbor ID Pri State Dead Time Address Interface
10.1.1.2 1 FULL/DR 00:00:36 192.168.1.2 GigabitEthernet0/0
10.1.1.3 1 2WAY/DROTHER 00:00:39 192.168.1.3 GigabitEthernet0/0
10.1.1.4 1 FULL/BDR 00:00:34 192.168.1.4 GigabitEthernet0/0
10.1.1.5 1 DOWN - 192.168.1.5 GigabitEthernet0/0
A
The router R1 has an incorrect router ID.
Why wrong: No evidence of incorrect ID.
B
There is a duplex mismatch on interface GigabitEthernet0/0.
Why wrong: Not indicated in OSPF neighbor output.
C
The DR election has failed.
Why wrong: FULL/DR and FULL/BDR exist.
D
The neighbor 10.1.1.5 is not receiving OSPF packets.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The neighbor 10.1.1.5 is not receiving OSPF packets.
Option A is correct because the neighbor 10.1.1.5 is in DOWN state, indicating it is not receiving OSPF hello packets. Option B is incorrect because router ID is not shown as incorrect. Option C is incorrect because FULL/DR and FULL/BDR exist, so DR election completed. Option D is incorrect because there is no indication of duplex mismatch.
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.
✗
The router R1 has an incorrect router ID.
Why it's wrong here
No evidence of incorrect ID.
✗
There is a duplex mismatch on interface GigabitEthernet0/0.
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
Not indicated in OSPF neighbor output.
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 CAPM OSPF questions on adjacency and route selection.
Business Analysis Frameworks — This question tests Business Analysis Frameworks — OSPF neighbours must agree on key parameters..
What is the correct answer to this question?
The correct answer is: The neighbor 10.1.1.5 is not receiving OSPF packets. — Option A is correct because the neighbor 10.1.1.5 is in DOWN state, indicating it is not receiving OSPF hello packets. Option B is incorrect because router ID is not shown as incorrect. Option C is incorrect because FULL/DR and FULL/BDR exist, so DR election completed. Option D is incorrect because there is no indication of duplex mismatch.
What should I do if I get this CAPM 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 CAPM OSPF questions on adjacency and route selection.
What is the key concept behind this question?
OSPF neighbours must agree on key parameters.
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