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Google Professional-Cloud-Network-Engineer Exam Syllabus Topics:

Section	Objectives
Design and plan a Google Cloud network	- VPC design and topology planning 1. Subnet design and IP address planning 2. Regional vs global architecture considerations - Hybrid and multi-cloud architecture design 1. Routing strategy design (BGP) 2. Interconnect and VPN planning
Manage, monitor, and optimize network operations	- Network monitoring and logging 1. Network Intelligence Center tools 2. Cloud Monitoring and Logging usage - Security and troubleshooting 1. Latency and connectivity diagnostics 2. Firewall and security policy troubleshooting
Implement hybrid connectivity	- VPN and peering 1. VPC peering and Shared VPC 2. HA VPN setup - Dedicated and partner interconnect 1. VLAN attachments and configuration 2. High availability design patterns
Implement virtual networks	- VPC configuration 1. Custom mode VPC setup 2. Firewall rules configuration - Load balancing and traffic management 1. HTTP(S), TCP/SSL load balancing 2. Cloud DNS configuration

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Google Cloud Certified - Professional Cloud Network Engineer Sample Questions (Q259-Q264):

NEW QUESTION # 259
An application development team believes their current logging tool will not meet their needs for their new cloud-based product. They want a better tool to capture errors and help them analyze their historical log data. You want to help them find a solution that meets their needs, what should you do?

A. Send them a list of online resources about logging best practices.
B. Direct them to download and install the Google StackDriver logging agent.
C. Help them define their requirements and assess viable logging tools.
D. Help them upgrade their current tool to take advantage of any new features.

Answer: C

Explanation:
A and D can be ruled out for them are not general IT good practices. They need your help, not just simply to sell your products, or point them to the crowded resource without explains.
B (Correct Answer) - Help them define their requirements and assess viable logging tools. They know the requirements and the existing tools' problems. While it's true StackDriver Logging and Error Reporting meet all their requirements, they need you to provide expertise to make assessment for new tools, specifically, logging tools that can capture errors and help them analyze their historical log data?
C - Help them upgrade their current tool to take advantage of any new features. They have already used and know those tools' shortcomings. They need your help to find better one. Simply help them upgrade for new features is not enough and may not resolve the problems

NEW QUESTION # 260
You are designing a solution to inspect all traffic between your company's production-vpc and development-vpc for threat detection and compliance logging. The company will deploy a fleet of third-party Cloud Next Generation Firewall (NGFW) appliances that provide intrusion prevention system (IPS) capabilities. You need to prevent attacks by blocking malicious traffic in real time before it reaches its destination without adding significant latency or creating a single point of failure for inter-VPC communication. What should you do?

A. Configure a Cloud NAT gateway to handle routing between the two VPCs, and enable NAT logging.
Use a script to parse the logs, and send them to the NGFW appliances.
B. Use Packet Mirroring to send traffic to the third-party NGFW appliances.
When a threat is detected, have the appliances use the Google Cloud Armor API to insert a rule blocking the malicious source.
C. Use Packet Mirroring to create a copy of all inter-VPC traffic.
Forward it to an internal Application Load Balancer that distributes the traffic to the NGFW appliance fleet for analysis.
D. Deploy the third-party NGFW appliances as multi-NIC VMs, with an NIC in each VPC.
Create custom static routes in each VPC that direct traffic destined for the other VPC to an internal TCP/UDP load balancer that uses the NGFW appliances as its backends.

Answer: D

Explanation:
To block malicious traffic in real time, the NGFW appliances must be placed inline on the traffic path, not just receive mirrored copies. Google Cloud supports this pattern by using multi-NIC virtual appliances and custom static routes whose next hop is an internal passthrough Network Load Balancer with the appliances as backends. This provides active inspection and enforcement for traffic between the two VPCs while avoiding a single appliance bottleneck by distributing traffic across a fleet of health-checked firewall instances. Packet Mirroring is for out-of-band detection and analysis, not inline prevention.
Reference:
https://docs.cloud.google.com/load-balancing/docs/internal/ilb-next-hop-overview
https://docs.cloud.google.com/vpc/docs/multiple-interfaces-concepts
https://docs.cloud.google.com/vpc/docs/packet-mirroring

NEW QUESTION # 261
Your company's cloud network has hybrid connectivity to an on-premises environment through Cloud Interconnect in two regions (us-east4 and us-west1). You received complaints that some on-premises destinations are no longer reachable from us-east4, after changes were made to advertise additional routes to us-west1. You need to troubleshoot to see if any routes were dropped. What should you do?

A. Query the dynamic_routes/learned_routes/dropped_unique_destinations metric and review the regional routing_mode metric attribute.
B. Query the dynamic_routes/learned_routes/dropped_unique_destinations metric and review the global routing_mode metric attribute.
C. Query the dynamic_routes/learned_routes/any_dropped_unique_destinations metric and review the regional routing_mode metric attribute.
D. Query the dynamic_routes/learned_routes/unique_destinations_limit metric and review the global routing_mode metric attribute.

Answer: B

Explanation:
Query the dynamic_routes/learned_routes/dropped_unique_destinations metric: This metric provides information about the number of unique routes that were dropped, helping you identify whether route limits have been exceeded.
Review the global routing_mode metric attribute: If global routing mode is enabled, it allows the routes learned in one region to be used in another. Reviewing the global routing mode ensures that the route advertisements and limits are correctly applied across regions.

NEW QUESTION # 262
Your company has separate Virtual Private Cloud (VPC) networks in a single region for two departments: Sales and Finance. The Sales department's VPC network already has connectivity to on-premises locations using HA VPN, and you have confirmed that the subnet ranges do not overlap. You plan to peer both VPC networks to use the same HA tunnels for on-premises connectivity, while providing internet connectivity for the Google Cloud workloads through Cloud NAT. Internet access from the on-premises locations should not flow through Google Cloud. You need to propagate all routes between the Finance department and on-premises locations. What should you do?

A. Peer the two VPCs. Configure VPC Network Peering to export custom routes from Sales and import custom routes on Finance's VPC network. Use Cloud Router's custom route advertisements to announce a default route to the on-premises locations.
B. Peer the two VPCs. Configure VPC Network Peering to export custom routes from Sales and import custom routes on Finance's VPC network. Use Cloud Router's custom route advertisements to announce the peered VPC network ranges to the on-premises locations.
C. Peer the two VPCs, and use Cloud Router's custom route advertisements to announce the peered VPC network ranges to the on-premises locations.
D. Peer the two VPCs, and use the default configuration for the Cloud Routers.

Answer: D

NEW QUESTION # 263
You are troubleshooting connectivity issues between Google Cloud and a public SaaS provider.
Connectivity between the two environments is through the public internet. Your users are reporting intermittent connection errors when using TCP to connect; however, ICMP tests show no failures. According to users, errors occur around the same time every day. You want to troubleshoot and gather information by using Google Cloud tools that are most likely to provide insights to what is occurring within Google Cloud. What should you do?

A. Enable and review Cloud Logging for Cloud Armor. Look for logs with errors matching the destination IP address of the public SaaS provider.
B. Create a Connectivity Test by using TCP, the source IP address of your test VM, and the destination IP address of the public SaaS provider. Review the live data plane analysis and take the next steps based on the test results.
C. Enable the Firewall Insights API. Set the denyrule insights observation period to one day.
Review the insights to assure there are no firewall rules denying traffic.
D. Enable and review Cloud Logging on your Cloud NAT gateway. Look for logs with errors matching the destination IP address of the public SaaS provider.

Answer: B

Explanation:
Google Cloud's Connectivity Tests tool provides detailed insights into network paths and issues between Google Cloud resources and external endpoints. By creating a TCP-based connectivity test to the destination IP address of the SaaS provider, the engineer can:
- Analyze the full network path, including routing and firewall rules within Google Cloud.
- Identify issues such as misconfigured routes, firewalls, or NAT gateways.
- Gain insights into live traffic flows, which can help diagnose intermittent connectivity errors.
Since ICMP is working, the issue may be protocol-specific (TCP). Connectivity Tests allow you to specifically test TCP connections and analyze the results, providing the most actionable insights for troubleshooting. This approach directly targets the problem and helps narrow down the root cause.

NEW QUESTION # 264
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