20+ practice questions focused on Implementing hybrid interconnectivity — one of the most tested topics on the Google Professional Cloud Network Engineer exam. Each question includes a detailed explanation so you learn why the right answer is correct.
Start Implementing hybrid interconnectivity PracticeA company is deploying a Dedicated Interconnect with a 10 Gbps circuit to Google Cloud. They need to ensure high availability. Which configuration is required by Google Cloud to meet the high availability SLA?
Explanation: To meet the high availability SLA for Dedicated Interconnect, Google Cloud requires at least two VLAN attachments, each on a separate Cloud Router in different zones. This ensures that if one zone or Cloud Router fails, traffic can still flow through the other attachment, providing redundancy. A single VLAN attachment or a single Cloud Router does not meet the 99.99% availability SLA because it creates a single point of failure.
A company has a Hybrid Connectivity setup using Cloud VPN with dynamic routing (BGP). They notice that traffic from their on-premises network to Google Cloud is intermittently dropping. The on-premises BGP speaker is sending routes with a higher local preference (200) than the Google Cloud router (default 100). What is the most likely cause of the intermittent drops?
Explanation: The on-premises BGP speaker is sending routes with a higher local preference (200) than the default on Cloud Router (100). This makes the on-premises route preferred for return traffic from Google Cloud, but the forward traffic from on-premises may still use the Cloud VPN tunnel. This asymmetry causes stateful firewalls (e.g., on-premises firewall or Google Cloud firewall) to drop packets that do not match an existing session, leading to intermittent drops.
A multinational corporation is connecting five on-premises data centers to Google Cloud using Cloud Interconnect. Each data center has a dedicated 10 Gbps connection. They want to ensure that if one Interconnect fails, traffic is automatically redistributed across the remaining connections without manual intervention. Which solution meets this requirement?
Explanation: Option D is correct because Cloud Router with BGP enables dynamic routing, allowing multiple BGP sessions over each Cloud Interconnect. When one interconnect fails, BGP withdraws the affected routes, and traffic is automatically redistributed across the remaining BGP sessions without manual intervention. This meets the requirement for automatic failover and load balancing across the five 10 Gbps connections.
An organization wants to migrate legacy on-premises applications to Google Cloud but must maintain low-latency connectivity for real-time data synchronization. The on-premises data center is in a colocation facility that is not directly served by Google Cloud. Which hybrid connectivity option is most cost-effective while meeting the latency requirement?
Explanation: Partner Interconnect is the most cost-effective option because it provides a dedicated, low-latency connection through a supported service provider that can extend connectivity from the colocation facility to a Google Cloud region. Unlike Dedicated Interconnect, it does not require physical cross-connects in a Google Cloud colocation facility, making it ideal when the on-premises site is not directly served by Google Cloud. It meets the real-time synchronization latency requirement by offering a reliable, high-bandwidth connection with SLA-backed uptime.
A company is using Cloud VPN with BGP to connect their on-premises network to Google Cloud. They have two VPN tunnels from two different on-premises VPN gateways to a single Cloud VPN gateway. They notice that during maintenance on one on-premises gateway, traffic fails over to the other tunnel, but after the maintenance, traffic does not fail back. What is the most likely cause?
Explanation: B is correct because BGP local preference is used to influence outbound traffic path selection. If the primary tunnel's local preference is not higher than the backup tunnel, BGP will not prefer the primary route after the backup session recovers, causing traffic to remain on the backup tunnel. This is a classic BGP route selection behavior where the highest local preference wins.
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Practice all Implementing hybrid interconnectivity questions1. Baseline your knowledge
Start with 10 questions to gauge your current understanding of Implementing hybrid interconnectivity. This tells you whether you need a concept refresher or just practice.
2. Review every explanation
For each question — right or wrong — read the full explanation. Understanding why an answer is correct is more valuable than knowing the answer itself.
3. Focus on exam traps
Implementing hybrid interconnectivity questions on the PCNE frequently use trap wording. Look for subtle differences in answers that test your precision, not just general knowledge.
4. Reach 80% consistently
Do repeated sessions until you score 80%+ three times in a row. Then move to mixed-mode practice to test cross-topic recall under realistic conditions.
The exact number varies per candidate. Implementing hybrid interconnectivity is tested as part of the Google Professional Cloud Network Engineer blueprint. Practicing with targeted Implementing hybrid interconnectivity questions ensures you can handle any format or difficulty that appears.
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