PCNE Implementing hybrid interconnectivity Practice Question
This PCNE practice question tests your understanding of implementing hybrid interconnectivity. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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.
An enterprise is evaluating connectivity options to Google Cloud. They have moderate bandwidth requirements (up to 1 Gbps) and need high availability. Which two of the following are appropriate solutions? (Choose two.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
HA VPN over the internet.
HA VPN (High-Availability VPN) uses two tunnels to two separate Cloud VPN gateways, providing automatic failover and meeting the 99.99% SLA when configured with dynamic routing (BGP). This solution supports up to 3 Gbps per tunnel pair, easily covering the 1 Gbps requirement, and uses the public internet without needing physical cross-connects.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
HA VPN over the internet.
Why this is correct
HA VPN provides up to 1.5 Gbps per tunnel and high availability with BGP.
Related concept
Read the scenario before looking for a memorised answer.
✗
VPC peering with a third-party network.
Why it's wrong here
VPC peering is for connecting Google Cloud VPCs, not for on-premises connectivity.
✓
Partner Interconnect with 1 Gbps connection.
Why this is correct
Partner Interconnect offers 1 Gbps speed and is highly available.
Related concept
Read the scenario before looking for a memorised answer.
✗
Classic VPN with a single tunnel.
Why it's wrong here
Classic VPN is not highly available; a single tunnel has no redundancy.
✗
Dedicated Interconnect with 10 Gbps connections.
Why it's wrong here
Dedicated Interconnect is over-provisioned and more expensive for 1 Gbps need.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Google Cloud often tests the misconception that any VPN with 'HA' in the name is automatically suitable for high availability, but the trap here is that Classic VPN (option D) lacks redundancy and BGP, while HA VPN (option A) is the correct choice; candidates may also incorrectly assume Dedicated Interconnect (option E) is always better, ignoring the bandwidth requirement and cost efficiency.
Detailed technical explanation
How to think about this question
HA VPN uses two external interfaces on two Cloud VPN gateways, each with its own public IP, and establishes two IPsec tunnels (IKEv2) to the on-premises peer. BGP sessions over each tunnel advertise the same routes, enabling active-active or active-passive failover with a failover time of under 60 seconds. For bandwidth up to 1 Gbps, a single HA VPN tunnel pair can handle the load, and the solution scales to 3 Gbps without additional hardware.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Implementing hybrid interconnectivity — This question tests Implementing hybrid interconnectivity — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: HA VPN over the internet. — HA VPN (High-Availability VPN) uses two tunnels to two separate Cloud VPN gateways, providing automatic failover and meeting the 99.99% SLA when configured with dynamic routing (BGP). This solution supports up to 3 Gbps per tunnel pair, easily covering the 1 Gbps requirement, and uses the public internet without needing physical cross-connects.
What should I do if I get this PCNE question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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