Google Cloud · PCNE
Validates expertise in designing, implementing, and managing Google Cloud network infrastructure including VPCs, hybrid connectivity, load balancing, and network security.
Practice Questions
881
≈ 17 practice exams
Duration
120 minutes
Passing Score
Not publicly disclosed
Difficulty
ProfessionalLast Updated
Jan 2025
Use this PCNE practice exam to prepare for Google Cloud Certified - Professional Cloud Network Engineer (PCNE) with realistic questions, detailed explanations, and focused study modes. The practice bank includes 881 questions for Google Cloud PCNE, so you can review the exam steadily instead of relying on one long cram session.
As you practice, pay extra attention to recurring topics such as VPC Design and Planning, Network Implementation, Managed Network Services, Hybrid and Multi-Cloud Connectivity, and Network Operations and Monitoring. Start with short sessions to identify weak areas, then move into timed quizzes once your accuracy is consistent.
The explanations are especially useful when you want to connect exam wording to the responsibilities and scenarios described in the official certification guidance. Use the free preview first, then unlock the full question bank when you are ready to build a complete study routine.
The Google Cloud Certified – Professional Cloud Network Engineer (PCNE) credential validates advanced expertise in designing, implementing, and managing network infrastructure on Google Cloud. The certification covers the full lifecycle of cloud networking: from architecting Virtual Private Cloud (VPC) topologies and configuring firewall rules, routes, and DNS, to deploying managed services such as Cloud Load Balancing, Cloud CDN, Cloud NAT, and Cloud Armor. It also assesses deep knowledge of hybrid and multi-cloud connectivity through technologies like HA VPN, Cloud Interconnect (Dedicated and Partner), and Network Connectivity Center.
Considered one of the most challenging among Google Cloud's professional-tier certifications, the PCNE exam demands hands-on proficiency with network security architectures, BGP routing, Private Service Connect, packet mirroring, and network observability tools such as VPC Flow Logs and Network Intelligence Center. Candidates are expected to understand the trade-offs between connectivity options, design patterns for Shared VPC and VPC peering, and how to troubleshoot live network environments on Google Cloud.
This certification is designed for network engineers, cloud architects, and infrastructure specialists who design and manage production-grade network environments on Google Cloud. Ideal candidates are professionals who have transitioned from on-premises networking roles into cloud-centric positions, or cloud engineers who own networking responsibilities within their organizations. Typical job titles include Cloud Network Engineer, Network Architect, Senior Cloud Infrastructure Engineer, and Solutions Architect with a networking focus.
Candidates are expected to have a strong foundation in core networking concepts—routing protocols (especially BGP), switching, firewalling, DNS, and load balancing—combined with practical Google Cloud experience. Google recommends at least three years of industry networking experience, with at least one year specifically involving the design and management of Google Cloud–based solutions.
There are no formal prerequisites required to register for the exam. However, Google recommends that candidates have a minimum of three years of industry experience in networking and at least one year of hands-on experience designing and managing solutions on Google Cloud. Candidates without this background are likely to find the exam extremely difficult.
Recommended foundational knowledge includes: IP networking fundamentals (subnetting, routing, NAT), familiarity with BGP and dynamic routing concepts, experience with firewall policy design and network security principles, and working knowledge of DNS (including DNSSEC and split-horizon DNS). Completing Google Cloud's official Professional Cloud Network Engineer learning path on Cloud Skills Boost, including the associated Qwiklabs hands-on labs, is strongly advised before attempting the exam.
The exam consists of 50–60 multiple-choice and multiple-select questions and must be completed within a 2-hour (120-minute) time limit. The exam is available in English and Japanese. Candidates may take the exam either remotely via online proctoring (using Kryterion's Webassessor platform) or in person at an authorized Kryterion testing center. The registration fee is $200 USD (plus applicable taxes).
Google does not publish a specific numeric passing score; results are reported as pass or fail based on a scaled scoring model. The exam is proctored and closed-book—no reference materials are permitted. Certification is valid for two years, after which candidates must renew through a recertification exam during the designated eligibility window.
The Professional Cloud Network Engineer certification positions holders for specialized, high-demand roles including Cloud Network Engineer, Network Architect, Senior Infrastructure Engineer, and Cloud Solutions Architect. Google Cloud's networking specialization commands strong compensation: certified professionals in this discipline report average salaries around $163,000 per year in the United States, reflecting the relative scarcity of engineers who combine deep networking expertise with hands-on Google Cloud experience. Certified professionals consistently earn 10–18% more than non-certified peers in equivalent roles.
As enterprises accelerate hybrid and multi-cloud adoption, network engineers who can design secure, scalable connectivity between on-premises environments and Google Cloud are in sustained demand. The PCNE credential is recognized by Google's partner network as a validated specialization, making it relevant for both independent consultants and professionals employed at Google Cloud partners seeking to demonstrate client-facing expertise. Compared to AWS and Azure networking certifications, the PCNE is considered narrower in scope but deeper in technical rigor, making it a strong differentiator for engineers focused specifically on the Google Cloud ecosystem.
5 sample questions with answers and explanations. The full bank has 881 questions, enough for 17 full-length practice exams.
Preview — answers shown1. Contoso is deploying Secure Web Proxy and needs to create a proxy subnet. What subnet purpose must they use for the proxy infrastructure?
Explanation
Secure Web Proxy requires a subnet with purpose REGIONAL_MANAGED_PROXY. This subnet allocates IP addresses on the egress side of each proxy for interaction with Cloud NAT and destinations in the VPC network. The proxy subnet must not overlap with other networks being served by the Secure Web Proxy. This is the same subnet purpose used by regional Application Load Balancers and other managed proxy infrastructure.
2. Litware needs to create a proxy-only subnet for their regional external Application Load Balancer. What is the minimum recommended size for this subnet?
Explanation
Google recommends a /23 subnet (512 addresses) for proxy-only subnets to accommodate Envoy proxy scaling. While the minimum technical requirement is /26 (64 addresses), this may not provide sufficient capacity for production workloads with high traffic volumes. The proxy-only subnet must have enough IP addresses to support the number of Envoy proxy instances that the load balancer may need to scale to. A /23 provides room for growth and handles traffic spikes. Smaller subnets like /28 or /26 may lead to capacity issues during peak loads or when scaling out.
3. Tailwind Traders is configuring Private NAT and needs to understand the NAT type behavior. According to RFC 3489, what type of NAT is Private NAT classified as?
Explanation
Private NAT is classified as a Port Restricted Cone NAT as defined in RFC 3489. This means that an internal host can receive packets from an external host only if the internal host had previously sent a packet to that external IP address and port. This provides a balance between allowing return traffic for established connections while restricting unsolicited inbound traffic, which is appropriate for private-to-private NAT scenarios.
4. Adventure Works needs to understand how Private NAT handles TCP connection timeouts. What is the default TCP established connection timeout for Private NAT?
Explanation
Private NAT uses the same timeout values as public Cloud NAT. The default TCP established connection idle timeout is 1200 seconds (20 minutes). For TCP transitory connections, the default timeout is 30 seconds. For UDP, the default timeout is 30 seconds. These timeouts can be adjusted using Cloud NAT configuration options to match application requirements.
5. Litware is using Private NAT to enable communication between VPC spokes in Network Connectivity Center. They need to create a subnet for NAT IP addresses. What subnet purpose must they specify?
Explanation
When configuring Private NAT for Network Connectivity Center spokes or Hybrid NAT, you must create a subnet with purpose PRIVATE_NAT. This subnet provides the IP addresses used for source NAT translation when traffic flows between overlapping networks. The PRIVATE_NAT subnet must not overlap with any existing subnet in the connected VPC spokes or hybrid networks. Other subnet purposes serve different functions like load balancing or Private Service Connect.
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