Professional Cloud Network Engineer practice test

1. Question 1 · 1

   You need to restrict access to your Google Cloud load-balanced application so that only specific IP addresses can connect. What should you do?

   Choose one answer.

   • Create a secure perimeter using the Access Context Manager feature of VPC Service Controls and restrict access to the source IP range of the allowed clients and Google health check IP ranges.
   • Create a secure perimeter using VPC Service Controls, and mark the load balancer as a service restricted to the source IP range of the allowed clients and Google health check IP ranges.
   • Tag the backend instances "application," and create a firewall rule with target tag "application" and the source IP range of the allowed clients and Google health check IP ranges.
   • Label the backend instances "application," and create a firewall rule with the target label "application" and the source IP range of the allowed clients and Google health check IP ranges.

2. Question 2 · 1

   You created a new VPC network named Dev with a single subnet. You added a firewall rule for the network Dev to allow HTTP traffic only and enabled logging. When you try to log in to an instance in the subnet via Remote Desktop Protocol, the login fails. You look for the Firewall rules logs in Stackdriver Logging, but you do not see any entries for blocked traffic. You want to see the logs for blocked traffic. What should you do?

   Choose one answer.

   • Check the VPC flow logs for the instance.
   • Try connecting to the instance via SSH, and check the logs.
   • Create a new firewall rule to allow traffic from port 22, and enable logs.
   • Create a new firewall rule with priority 65500 to deny all traffic, and enable logs.

3. Question 3 · 1

   You are designing the network architecture for your organization. Your organization has three developer teams: Web, App, and Database. All of the developer teams require access to Compute Engine instances to perform their critical tasks. You are part of a small network and security team that needs to provide network access to the developers. You need to maintain centralized control over network resources, including subnets, routes, and firewalls. You want to minimize operational overhead. How should you design this topology?

   Choose one answer.

   • Configure a host project with a Shared VPC. Create service projects for Web, App, and Database.
   • Configure one VPC for Web, one VPC for App, and one VPC for Database. Configure HA VPN between each VPC.
   • Configure three Shared VPC host projects, each with a service project: one for Web, one for App, and one for Database.
   • Configure one VPC for Web, one VPC for App, and one VPC for Database. Use VPC Network Peering to connect all VPCs in a full mesh.

4. Question 4 · 1

   Your company has 10 separate Virtual Private Cloud (VPC) networks, with one VPC per project in a single region in Google Cloud. Your security team requires each VPC network to have private connectivity to the main on-premises location via a Partner Interconnect connection in the same region. To optimize cost and operations, the same connectivity must be shared with all projects. You must ensure that all traffic between different projects, on-premises locations, and the internet can be inspected using the same third-party appliances. What should you do?

   Choose one answer.

   • Configure the third-party appliances with multiple interfaces and specific Partner Interconnect VLAN attachments per project. Create the relevant routes on the third-party appliances and VPC networks.
   • Configure the third-party appliances with multiple interfaces, with each interface connected to a separate VPC network. Create separate VPC networks for on-premises and internet connectivity. Create the relevant routes on the third-party appliances and VPC networks.
   • Consolidate all existing projects’ subnetworks into a single VPCreate separate VPC networks for on-premises and internet connectivity. Configure the third-party appliances with multiple interfaces, with each interface connected to a separate VPC network. Create the relevant routes on the third-party appliances and VPC networks.
   • Configure the third-party appliances with multiple interfaces. Create a hub VPC network for all projects, and create separate VPC networks for on-premises and internet connectivity. Create the relevant routes on the third-party appliances and VPC networks. Use VPC Network Peering to connect all projects’ VPC networks to the hub VPC. Export custom routes from the hub VPC and import on all projects’ VPC networks.

5. Question 5 · 1

   You have just deployed your infrastructure on Google Cloud. You now need to configure the DNS to meet the following requirements: • Your on-premises resources should resolve your Google Cloud zones. • Your Google Cloud resources should resolve your on-premises zones. • You need the ability to resolve “.internal” zones provisioned by Google Cloud. What should you do?

   Choose one answer.

   • Configure an outbound server policy, and set your alternative name server to be your on-premises DNS resolver. Configure your on-premises DNS resolver to forward Google Cloud zone queries to Google's public DNS 8.8.8.8.
   • Configure both an inbound server policy and outbound DNS forwarding zones with the target as the on-premises DNS resolver. Configure your on-premises DNS resolver to forward Google Cloud zone queries to Google Cloud's DNS resolver.
   • Configure an outbound DNS server policy, and set your alternative name server to be your on-premises DNS resolver. Configure your on-premises DNS resolver to forward Google Cloud zone queries to Google Cloud's DNS resolver.
   • Configure Cloud DNS to DNS peer with your on-premises DNS resolver. Configure your on-premises DNS resolver to forward Google Cloud zone queries to Google's public DNS 8.8.8.8.

6. Question 6 · 1

   You have a Cloud Storage bucket in Google Cloud project XYZ. The bucket contains sensitive data. You need to design a solution to ensure that only instances belonging to VPCs under project XYZ can access the data stored in this Cloud Storage bucket. What should you do?

   Choose one answer.

   • Configure Private Google Access to privately access the Cloud Storage service using private IP addresses.
   • Configure a VPC Service Controls perimeter around project XYZ, and include storage.googleapis.com as a restricted service in the service perimeter.
   • Configure Cloud Storage with projectPrivate Access Control List (ACL) that gives permission to the project team based on their roles.
   • Configure Private Service Connect to privately access Cloud Storage from all VPCs under project XYZ.

7. Question 7 · 1

   You are maintaining a Shared VPC in a host project. Several departments within your company have infrastructure in different service projects attached to the Shared VPC and use Identity and Access Management (IAM) permissions to manage the cloud resources in those projects. VPC Network Peering is also set up between the Shared VPC and a common services VPC that is not in a service project. Several users are experiencing failed connectivity between certain instances in different Shared VPC service projects and between certain instances and the internet. You need to validate the network configuration to identify whether a misconfiguration is the root cause of the problem. What should you do?

   Choose one answer.

   • Review the VPC audit logs in Cloud Logging for the affected instances.
   • Use Secure Shell (SSH) to connect to the affected Compute Engine instances, and run a series of PING tests to the other affected endpoints and the 8.8.8.8 IPv4 address.
   • Run Connectivity Tests from Network Intelligence Center to check connectivity between the affected endpoints in your network and the internet.
   • Enable VPC Flow Logs for all VPCs, and review the logs in Cloud Logging for the affected instances.

8. Question 8 · 1

   You recently configured Google Cloud Armor security policies to manage traffic to your application. You discover that Google Cloud Armor is incorrectly blocking some traffic to your application. You need to identity the web application firewall (WAF) rule that is incorrectly blocking traffic. What should you do?

   Choose one answer.

   • Enable firewall logs, and view the logs in Firewall Insights.
   • Enable HTTP(S) Load Balancing logging with sampling rate equal to 1, and view the logs in Cloud Logging.
   • Enable VPC Flow Logs, and view the logs in Cloud Logging.
   • Enable Google Cloud Armor audit logs, and view the logs on the Activity page in the Google Cloud Console.

9. Question 9 · 1

   You are the Organization Admin for your company. One of your engineers is responsible for setting up multiple host projects across multiple folders and sharing subnets with service projects. You need to enable the engineer's Identity and Access Management (IAM) configuration to complete their task in the fewest number of steps. What should you do?

   Choose one answer.

   • Set up the engineer with Compute Shared VPC Admin IAM role at the folder level.
   • Set up the engineer with Compute Shared VPC Admin IAM role at the organization level.
   • Set up the engineer with Compute Shared VPC Admin IAM role and Project IAM Admin role at the folder level.
   • Set up the engineer with Compute Shared VPC Admin IAM role and Project IAM Admin role at the organization level.

10. Question 10 · 1

    You recently deployed Compute Engine instances in regions us-west1 and us-east1 in a Virtual Private Cloud (VPC) with default routing configurations. Your company security policy mandates that virtual machines (VMs) must not have public IP addresses attached to them. You need to allow your instances to fetch updates from the internet while preventing external access. What should you do?

    Choose one answer.

    • Create a Cloud NAT gateway and Cloud Router in both us-west1 and us-east1.
    • Create a single global Cloud NAT gateway and global Cloud Router in the VPC.
    • Change the instances’ network interface external IP address from None to Ephemeral.
    • Create a firewall rule that allows egress to destination 0.0.0.0/0.

11. Question 11 · 1

    You are trying to update firewall rules in a shared VPC for which you have been assigned only Network Admin permissions. You cannot modify the firewall rules. Your organization requires using the least privilege necessary. Which level of permissions should you request?

    Choose one answer.

    • Security Admin privileges from the Shared VPC Admin.
    • Service Project Admin privileges from the Shared VPC Admin.
    • Shared VPC Admin privileges from the Organization Admin.
    • Organization Admin privileges from the Organization Admin.

12. Question 12 · 1

    You are designing a new global application using Compute Engine instances that will be exposed by a global HTTP(S) load balancer. You need to secure your application from distributed denial-of-service and application layer (layer 7) attacks. What should you do?

    Choose one answer.

    • Configure VPC Service Controls and create a secure perimeter. Define fine-grained perimeter controls and enforce that security posture across your Google Cloud services and projects.
    • Configure a Google Cloud Armor security policy in your project, and attach it to the backend service to secure the application.
    • Configure VPC firewall rules to protect the Compute Engine instances against distributed denial-of-service attacks.
    • Configure hierarchical firewall rules for the global HTTP(S) load balancer public IP address at the organization level.

13. Question 13 · 1

    Your organization's security policy requires that all internet-bound traffic return to your on-premises data center through HA VPN tunnels before egressing to the internet, while allowing virtual machines (VMs) to leverage private Google APIs using private virtual IP addresses 199.36.153.4/30. You need to configure the routes to enable these traffic flows. What should you do?

    Choose one answer.

    • Configure a custom route 0.0.0.0/0 with a priority of 500 whose next hop is the default internet gateway. Configure another custom route 199.36.153.4/30 with priority of 1000 whose next hop is the VPN tunnel back to the on-premises data center.
    • Configure a custom route 0.0.0.0/0 with a priority of 1000 whose next hop is the internet gateway. Configure another custom route 199.36.153.4/30 with a priority of 500 whose next hop is the VPN tunnel back to the on-premises data center.
    • Announce a 0.0.0.0/0 route from your on-premises router with a MED of 1000. Configure a custom route 199.36.153.4/30 with a priority of 1000 whose next hop is the default internet gateway.
    • Announce a 0.0.0.0/0 route from your on-premises router with a MED of 500. Configure another custom route 199.36.153.4/30 with a priority of 1000 whose next hop is the VPN tunnel back to the on-premises data center.

14. Question 14 · 1

    Your company has defined a resource hierarchy that includes a parent folder with subfolders for each department. Each department defines their respective project and VPC in the assigned folder and has the appropriate permissions to create Google Cloud firewall rules. The VPCs should not allow traffic to flow between them. You need to block all traffic from any source, including other VPCs, and delegate only the intra-VPC firewall rules to the respective departments. What should you do?

    Choose one answer.

    • Create a VPC firewall rule in each VPC to block traffic from any source, with priority 0.
    • Create a VPC firewall rule in each VPC to block traffic from any source, with priority 1000.
    • Create two hierarchical firewall policies per department's folder with two rules in each: a high-priority rule that matches traffic from the private CIDRs assigned to the respective VPC and sets the action to allow, and another lower-priority rule that blocks traffic from any other source.
    • Create two hierarchical firewall policies per department's folder with two rules in each: a high-priority rule that matches traffic from the private CIDRs assigned to the respective VPC and sets the action to goto_next, and another lower-priority rule that blocks traffic from any other source.

15. Question 15 · 1

    You have two Google Cloud projects in a perimeter to prevent data exfiltration. You need to move a third project inside the perimeter; however, the move could negatively impact the existing environment. You need to validate the impact of the change. What should you do?

    Choose one answer.

    • Enable Firewall Rules Logging inside the third project.
    • Modify the existing VPC Service Controls policy to include the new project in dry run mode.
    • Monitor the Resource Manager audit logs inside the perimeter.
    • Enable VPC Flow Logs inside the third project, and monitor the logs for negative impact.

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