- A
One Dedicated Interconnect connection with two VLAN attachments.
Why wrong: A single connection is a single point of failure.
- B
Two Dedicated Interconnect connections from different metro areas, configured for redundancy.
Diverse metro areas ensure independence and meet SLA requirements.
- C
One Dedicated Interconnect and one Partner Interconnect.
Why wrong: While possible, the SLA specifically requires two dedicated connections for 99.99%.
- D
Two Dedicated Interconnect connections in the same metro area.
Why wrong: Same metro area may share infrastructure.
Question 628 of 982
PCNE Implementing Hybrid Interconnectivity Practice Question
This PCNE practice question tests your understanding of implementing hybrid interconnectivity. 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.
A company has two Dedicated Interconnect connections from different metro areas to Google Cloud. They want to achieve a 99.99% SLA. What is the minimum requirement?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"minimum / minimize"Why it matters: Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
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
✓
Two Dedicated Interconnect connections from different metro areas, configured for redundancy.
To meet the 99.99% SLA, you need at least two connections that are diverse (different metro areas) and configured in active-active or active-passive mode. This ensures redundancy if one fails.
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.
- ✗
One Dedicated Interconnect connection with two VLAN attachments.
Why it's wrong here
A single connection is a single point of failure.
- ✓
Two Dedicated Interconnect connections from different metro areas, configured for redundancy.
Why this is correct
Diverse metro areas ensure independence and meet SLA requirements.
Clue confirmation
The clue word "minimum / minimize" in the question point toward this answer.
Related concept
OSPF neighbours must agree on key parameters.
- ✗
One Dedicated Interconnect and one Partner Interconnect.
Why it's wrong here
While possible, the SLA specifically requires two dedicated connections for 99.99%.
- ✗
Two Dedicated Interconnect connections in the same metro area.
Why it's wrong here
Same metro area may share infrastructure.
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.
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
An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.
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 PCNE OSPF questions on adjacency and route selection.
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Implementing Hybrid Interconnectivity — study guide chapter
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Implementing Hybrid Interconnectivity practice questions
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FAQ
Questions learners often ask
What does this PCNE question test?
Implementing Hybrid Interconnectivity — This question tests Implementing Hybrid Interconnectivity — OSPF neighbours must agree on key parameters..
What is the correct answer to this question?
The correct answer is: Two Dedicated Interconnect connections from different metro areas, configured for redundancy. — To meet the 99.99% SLA, you need at least two connections that are diverse (different metro areas) and configured in active-active or active-passive mode. This ensures redundancy if one fails.
What should I do if I get this PCNE 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 PCNE OSPF questions on adjacency and route selection.
Are there clue words in this question I should notice?
Yes — watch for: "minimum / minimize". Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
What is the key concept behind this question?
OSPF neighbours must agree on key parameters.
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Last reviewed: Jul 4, 2026
This PCNE practice question is part of Courseiva's free Google Cloud 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 PCNE exam.
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