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

Section	Objectives
Topic 1: Implement hybrid interconnectivity	- Implement hybrid networking solutions 1. Implement site-to-site connectivity 2. Configure Cloud Router and dynamic routing 3. Configure Cloud VPN 4. Configure Cloud Interconnect
Topic 2: Implement Virtual Private Cloud (VPC) instances	- Configure and manage VPC networks 1. Configure firewall rules 2. Manage GKE networking 3. Implement Shared VPC 4. Configure subnets and routes
Topic 3: Manage, monitor, and optimize network operations	- Monitor and troubleshoot network infrastructure 1. Troubleshoot connectivity issues 2. Monitor logs and metrics 3. Analyze latency and traffic flow 4. Optimize network cost and performance
Topic 4: Configure network services	- Deploy and manage Google Cloud network services 1. Configure Cloud CDN 2. Configure load balancing 3. Enable additional networking services 4. Configure Cloud DNS
Topic 5: Design, plan, and prototype a Google Cloud network	- Design overall network architecture 1. Design Virtual Private Cloud (VPC) networks 2. Design IP addressing plans for Google Kubernetes Engine 3. Plan secure and scalable network topologies 4. Design hybrid network connectivity
Topic 6: Implement network security	- Secure Google Cloud network environments 1. Configure Identity and Access Management 2. Configure third-party network security appliances 3. Configure Cloud Armor policies 4. Implement secure SSH access

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Google Cloud Certified - Professional Cloud Network Engineer Sample Questions (Q225-Q230):

NEW QUESTION # 225
You are deploying your infrastructure in the us-central1 region. Your on-premises data center is located in New York City, and the Google Cloud region closest to New York City is us-east4. Your Cloud Interconnect is located in Ashburn, Virginia (VA), United States. You need to use Cloud Interconnect to connect your application infrastructure with backend systems in your data center location. You do not expect the application bandwidth to exceed 500 Mbps. You want to minimize latency and cost. What should you do?

A. Create a Cloud Router in the us-central1 region and VLAN attachments in the us-east4 region attached to your physical Interconnect in Ashburn, VA. Enable global routing in your VPC.
B. Create a Cloud Router and VLAN attachments in the us-east4 region attached to your physical Interconnect in Ashburn, VA. Enable global routing in your VPC.
C. Create a Cloud Router and VLAN attachments in the us-east4 region attached to your physical Interconnect in Ashburn, VA. Enable global routing in your VPC. Set the bandwidth on the VLAN attachments to 500 Mbps.
D. Create a Cloud Router and VLAN attachments in the us-central1 region attached to your physical Interconnect in Ashburn, VA.

Answer: C

Explanation:
Proximity to Ashburn: Since your physical Cloud Interconnect is located in Ashburn (us-east4), creating a Cloud Router and VLAN attachments in the us-east4 region ensures the lowest latency between the Interconnect and Google Cloud infrastructure.
Global Routing: Enabling global routing in the VPC allows the resources in the us-central1 region to communicate seamlessly with the on-premises systems via the Interconnect in us-east4. This reduces the need to move the Interconnect closer to us-central1, minimizing cost and maintaining simplicity.
Bandwidth Configuration: Setting the VLAN attachments' bandwidth to 500 Mbps matches your application bandwidth requirements while optimizing costs for the specific use case.

NEW QUESTION # 226
You are designing a hybrid cloud environment for your organization. Your Google Cloud environment is interconnected with your on-premises network using Cloud HA VPN and Cloud Router. The Cloud Router is configured with the default settings. Your on-premises DNS server is located at 192.168.20.88 and is protected by a firewall, and your Compute Engine resources are located at 10.204.0.0/24. Your Compute Engine resources need to resolve on-premises private hostnames using the domain corp.altostrat.com while still resolving Google Cloud hostnames. You want to follow Google-recommended practices. What should you do?

A. Create a private forwarding zone in Cloud DNS for 'corp.altostrat.com' called corp-altostrat-com that points to 192.168 20.88.
Configure your on-premises firewall to accept traffic from 35.199.192.0/19 Set a custom route advertisement on the Cloud Router for 35.199.192.0/19.
B. Create a private forwarding zone in Cloud DNS for 'corp .altostrat.com' called corp-altostrat-com that points to 192.168.20.88.
Configure your on-premises firewall to accept traffic from 10.204.0.0/24.
Modify the /etc/resolv conf file on your Compute Engine instances to point to 192.168.20 88
C. Create a private zone in Cloud DNS for 'corp altostrat.com' called corp-altostrat-com.
Configure DNS Server Policies and create a policy with Alternate DNS servers to 192.168.20.88.
Configure your on-premises firewall to accept traffic from 35.199.192.0/19.
Set a custom route advertisement on the Cloud Router for 35.199.192.0/19.
D. Create a private forwarding zone in Cloud DNS for 'corp.altostrat.com' called corp-altostrat-com that points to 192.168.20.88.
Configure your on-premises firewall to accept traffic from 10.204.0.0/24.
Set a custom route advertisement on the Cloud Router for 10.204.0.0/24

Answer: C

NEW QUESTION # 227
All the instances in your project are configured with the custom metadata enable-oslogin value set to FALSE and to block project-wide SSH keys. None of the instances are set with any SSH key, and no project-wide SSH keys have been configured. Firewall rules are set up to allow SSH sessions from any IP address range. You want to SSH into one instance.
What should you do?

A. Generate a new SSH key pair. Verify the format of the private key and add it to the instance. SSH into the instance using a third-party tool like putty or ssh.
B. Generate a new SSH key pair. Verify the format of the public key and add it to the project. SSH into the instance using a third-party tool like putty or ssh.
C. Set the custom metadata enable-oslogin to TRUE, and SSH into the instance using a third-party tool like putty or ssh.
D. Open the Cloud Shell SSH into the instance using gcloud compute ssh.

Answer: C

NEW QUESTION # 228
You are designing a packet mirroring policy as pan of your network security architecture for your gaming workload. Your Infrastructure is located in the us-west2 region and deployed across several zones: us-west2- a. us-west2-b. and us-west2-c The Infrastructure Is running a web-based application on TCP ports 80 and 443 with other game servers that utilize the UDP protocol. You need to deploy packet mirroring policies and collector instances to monitor web application traffic while minimizing inter-zonal network egress costs.
Following Google-recommended practices, how should you deploy the packet mirroring policies and collector instances?

A. Create three packet mirroring policies: one for each zone. Create three groups of collector instances:
one group for each zone. Configure
each policy to match traffic for its zone based on subnets, and create a filter for TCP traffic
B. Create three packet mirroring policies: one for each zone. Create one group of collector instances for the us-west2 region. Configure each packet mirroring policy to match traffic for its zone based on instance-tags, and create a filter for TCP traffic
C. Create one packet mirroring policy for the us-west2 region. Create one group of collector instances for the us-west2 region Configure the packet mirroring policy to match traffic for web server instances based on instance-tags, and create a filter for TCP traffic.
D. Create three packet mirroring policies: one for each zone. Create three groups of collector instances:
one group for each zone. Configure each policy to match traffic for Its zone based on instance-tags, and create a filter for TCP traffic.

Answer: B

Explanation:
* Create Packet Mirroring Policies:
* You need to create three packet mirroring policies, one for each zone (us-west2-a, us-west2-b, and us-west2-c). This ensures that each zone's traffic is mirrored appropriately without unnecessary cross-zone traffic.
* Create Collector Instances:
* Set up one group of collector instances for the us-west2 region. Having a single group of collector instances for the entire region minimizes the number of instances required and simplifies the management while keeping egress costs low since the collectors are within the same region.
* Configuration of Policies:
* Each packet mirroring policy should be configured to match traffic for its specific zone. Use instance-tags to identify and match the relevant instances within each zone. This helps in correctly capturing the traffic from the appropriate sources.
* Filter for TCP Traffic:
* Create a filter for TCP traffic (ports 80 and 443). This step ensures that only the relevant web application traffic is mirrored, reducing the amount of data processed and improving efficiency.
* Cost Efficiency:
* By having packet mirroring policies specific to each zone and a regional collector group, you reduce inter-zonal network egress costs. The data remains within the same region, avoiding extra charges associated with cross-zone traffic.
:
Google Cloud Packet Mirroring Documentation
Best Practices for Packet Mirroring
Cost Management in Google Cloud
This solution aligns with Google-recommended practices by ensuring efficient traffic capture, minimal inter- zonal costs, and streamlined management of the packet mirroring setup.

NEW QUESTION # 229
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. 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.
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. 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.
D. 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.

Answer: A

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 # 230
......

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