Free Sample Questions to Practice Professional-Cloud-Network-Engineer Certification Test Engine [Apr-2024]
2024 Valid Professional-Cloud-Network-Engineer Real Exam Questions, practice Google Cloud Platform
How to book Google Professional Cloud Network Engineer Exams
The registration for the Google Professional Cloud Network Engineer Exam follows the steps given below.
- Step 1: Visit the Google Cloud Webassessor Website
- Step 2: Sign in or sign up to your Google Cloud Webassessor account
- Step 3: Search for the exam name Google Professional Cloud Network Engineer
- Step 4: Take the date of the exam, choose exam center and make further payment using payment method like credit/debit etc.
Achieving the Google Professional-Cloud-Network-Engineer certification demonstrates a candidate's expertise and ability to design and implement network solutions on the Google Cloud Platform. Google Cloud Certified - Professional Cloud Network Engineer certification is recognized by employers and industry experts as a valuable credential that validates a candidate's skills and knowledge in networking technologies. Certified professionals are equipped with the tools and knowledge required to design, implement, and manage network solutions on the Google Cloud Platform, making them highly sought after by organizations looking to leverage the power of the cloud for their networking needs.
Google Professional-Cloud-Network-Engineer (Google Cloud Certified - Professional Cloud Network Engineer) Certification Exam is designed for professionals who are interested in validating their skills in designing, implementing, and managing network solutions on the Google Cloud Platform. Google Cloud Certified - Professional Cloud Network Engineer certification exam is intended for applicants with a broad range of skills and expertise in networking technologies, including virtual private clouds, load balancing, and network security.
NEW QUESTION # 33
You have provisioned a Dedicated Interconnect connection of 20 Gbps with a VLAN attachment of 10 Gbps. You recently noticed a steady increase in ingress traffic on the Interconnect connection from the on-premises data center. You need to ensure that your end users can achieve the full 20 Gbps throughput as quickly as possible. Which two methods can you use to accomplish this? (Choose two.)
- A. From the Google Cloud Console, request a new Dedicated Interconnect connection of 20 Gbps, and configure a VLAN attachment of 10 Gbps.
- B. Configure an additional VLAN attachment of 10 Gbps in the same region. Configure the on-premises router to advertise routes with the same multi-exit discriminator (MED).
- C. From the Google Cloud Console, modify the bandwidth of the VLAN attachment to 20 Gbps.
- D. Configure Link Aggregation Control Protocol (LACP) on the on-premises router to use the 20-Gbps Dedicated Interconnect connection.
- E. Configure an additional VLAN attachment of 10 Gbps in another region. Configure the on-premises router to advertise routes with the same multi-exit discriminator (MED).
Answer: C,D
NEW QUESTION # 34
Your organization has Compute Engine instances in us-east1, us-west2, and us-central1. Your organization also has an existing Cloud Interconnect physical connection in the East Coast of the United States with a single VLAN attachment and Cloud Router in us-east1. You need to provide a design with high availability and ensure that if a region goes down, you still have access to all your other Virtual Private Cloud (VPC) subnets. You need to accomplish this in the most cost-effective manner possible. What should you do?
- A. Configure your VPC routing in regional mode.
Add additional Cloud Interconnect VLAN attachments in the us-west2 and us-central1 regions, and configure Cloud Routers in us-west2 and us-central1. - B. Configure your VPC routing in global mode.
Add an additional Cloud Interconnect VLAN attachment in the us-west2 region, and configure a Cloud Router in us-west2. - C. Configure your VPC routing in regional mode.
Add an additional Cloud Interconnect VLAN attachment in the us-east1 region, and configure a Cloud Router in us-east1. - D. Configure your VPC routing in global mode.
Add an additional Cloud Interconnect VLAN attachment in the us-east1 region, and configure a Cloud Router in us-east1.
Answer: D
NEW QUESTION # 35
All the instances in your project are configured with the custom metadata enable-osloginvalue 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 public key and add it to the project. SSH into the instance using a third-party tool like putty or ssh.
- B. Set the custom metadata enable-oslogin to TRUE, and SSH into the instance using a third-party tool like putty or ssh.
- C. 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.
- D. Open the Cloud Shell SSH into the instance using gcloud compute ssh.
Answer: B
Explanation:
Explanation/Reference: https://cloud.google.com/compute/docs/storing-retrieving-metadata
NEW QUESTION # 36
You have the networking configuration shown In the diagram Two VLAN attachments associated With two Dedicated Interconnect connections terminate on the same Cloud Router (mycloudrouter). The Interconnect connections terminate on two separate on-premises routers. You advertise the same prefixes from the Border Gateway Protocol (BOP) sessions associated With each Of the VLAN attachments.
You notice an asymmetric traffic flow between the two Interconnect connections. Which of the following actions should you take to troubleshoot the asymmetric traffic flow?
- A. From the Google Cloud console, navigate to the Hybrid Connectivity select the Cloud Router, and view BGP sessions.
- B. From the Cloud CLI. run gcloud compute routers describe mycloudrouter
- C. From the Google Cloud console, navigate to Cloud Logging to view VPC Flow Logs and review the results
- D. From the Cloud CLI, run gcloud compute -protect_ID router get-status mycloudrouter --region REGION and review the results.
Answer: D
Explanation:
--region REGION and review the results
Explanation:
The correct answer is B. From the Cloud CLI, run gcloud compute --project_ID router get-status mycloudrouter --region REGION and review the results.
This command will show you the BGP session status, the advertised and learned routes, and the last error for each VLAN attachment. You can use this information to troubleshoot the asymmetric traffic flow and identify any issues with the BGP configuration or the Interconnect connections.
The other options are not correct because:
Option A will only show you the BGP session status, but not the advertised and learned routes or the last error for each VLAN attachment.
Option C will only show you the VPC Flow Logs, which are useful for monitoring and troubleshooting network performance and security issues within your VPC network, but not for your Interconnect connections.
Option D will only show you the basic information about the Cloud Router, such as its name, region, network, and BGP settings, but not the detailed status of each VLAN attachment.
NEW QUESTION # 37
You create multiple Compute Engine virtual machine instances to be used at TFTP servers.
Which type of load balancer should you use?
- A. SSL proxy load balancer
- B. HTTP(S) load balancer
- C. Network load balancer
- D. TCP proxy load balancer
Answer: A
NEW QUESTION # 38
You are in the process of deploying an internal HTTP(S) load balancer for your web server virtual machine (VM) Instances What two prerequisite tasks must be completed before creating the load balancer?
Choose 2 answers
- A. Reserve a static IP address for the load balancer
- B. Determine the subnet mask for a proxy-only subnet.
- C. Choose a region.
- D. Determine the subnet mask for Serverless VPC Access.
- E. reate firewall rules for health checks
Answer: A,E
Explanation:
The correct answer is B and C. You must create firewall rules for health checks and reserve a static IP address for the load balancer before creating the internal HTTP(S) load balancer.
The other options are not correct because:
Option A is not a prerequisite task. You can choose a region when you create the load balancer, but you do not need to do it beforehand.
Option D is not a prerequisite task. You can determine the subnet mask for a proxy-only subnet when you create the subnet, but you do not need to do it beforehand.
Option E is not related to the internal HTTP(S) load balancer. Serverless VPC Access is a feature that allows you to connect your serverless applications to your VPC network, but it is not required for the load balancer.
NEW QUESTION # 39
You have several microservices running in a private subnet in an existing Virtual Private Cloud (VPC). You need to create additional serverless services that use Cloud Run and Cloud Functions to access the microservices. The network traffic volume between your serverless services and private microservices is low. However, each serverless service must be able to communicate with any of your microservices. You want to implement a solution that minimizes cost. What should you do?
- A. Create a serverless VPC access connector for each serverless service. Configure the connectors to allow traffic between the serverless services and your existing microservices.
- B. Create a serverless VPC access connector. Configure the serverless service to use the connector for communication to the microservices.
- C. Deploy your serverless services to the serverless VPC. Peer the serverless service VPC to the existing VPC. Configure firewall rules to allow traffic between the serverless services and your existing microservices.
- D. Deploy your serverless services to the existing VPC. Configure firewall rules to allow traffic between the serverless services and your existing microservices.
Answer: B
NEW QUESTION # 40
Your company just completed the acquisition of Altostrat (a current GCP customer). Each company has a separate organization in GCP and has implemented a custom DNS solution. Each organization will retain its current domain and host names until after a full transition and architectural review is done in one year. These are the assumptions for both GCP environments.
* Each organization has enabled full connectivity between all of its projects by using Shared VPC.
* Both organizations strictly use the 10.0.0.0/8 address space for their instances, except for bastion hosts (for accessing the instances) and load balancers for serving web traffic.
* There are no prefix overlaps between the two organizations.
* Both organizations already have firewall rules that allow all inbound and outbound traffic from the 10.0.0.0/8 address space.
* Neither organization has Interconnects to their on-premises environment.
You want to integrate networking and DNS infrastructure of both organizations as quickly as possible and with minimal downtime.
Which two steps should you take? (Choose two.)
- A. Provision Cloud Interconnect to connect both organizations together.
- B. Use Cloud DNS to create A records of all VMs and resources across all projects in both organizations.
- C. Set up some variant of DNS forwarding and zone transfers in each organization.
- D. Connect VPCs in both organizations using Cloud VPN together with Cloud Router.
- E. Create a third organization with a new host project, and attach all projects from your company and Altostrat to it using shared VPC
Answer: A,B
NEW QUESTION # 41
You need to create the network infrastructure to deploy a highly available web application in the us-east1 and us-west1 regions.
The application runs on Compute Engine instances, and it does not require the use of a database. You want to follow Google-recommended practices. What should you do?
- A. Create one VPC with one subnet in each region.
Create an HTTP(S) load balancer with a static IP address.
Choose the standard tier for the network.
Enable Cloud CDN on the load balancer.
Create a CNAME record using the load balancer's IP address in Cloud DNS. - B. Create one VPC in each region, and peer both VPCs.
Create a global load balancer.
Enable Cloud CDN on the load balancer.
Create a CNAME for the load balancer in Cloud DNS. - C. Create one VPC with one subnet in each region.
Create a global load balancer with a static IP address.
Enable Cloud CDN and Google Cloud Armor on the load balancer.
Create an A record using the IP address of the load balancer in Cloud DNS. - D. Create one VPC with one subnet in each region.
Create a regional network load balancer in each region with a static IP address.
Enable Cloud CDN on the load balancers.
Create an A record in Cloud DNS with both IP addresses for the load balancers.
Answer: B
NEW QUESTION # 42
You recently deployed Cloud VPN to connect your on-premises data canter to Google Cloud. You need to monitor the usage of this VPN and set up alerts in case traffic exceeds the maximum allowed. You need to be able to quickly decide whether to add extra links or move to a Dedicated Interconnect. What should you do?
- A. In the Network Intelligence Canter, check for the number of packet drops on the VPN.
- B. In the Monitoring section of the Google Cloud Console, use the Dashboard section to select a default dashboard for VPN usage.
- C. In the VPN section of the Google Cloud Console, select the VPN under hybrid connectivity, and then select monitoring to display utilization on the dashboard.
- D. In the Google Cloud Console, use Monitoring Query Language to create a custom alert for bandwidth utilization.
Answer: A
NEW QUESTION # 43
You have ordered Dedicated Interconnect in the GCP Console and need to give the Letter of Authorization/ Connecting Facility Assignment (LOA-CFA) to your cross-connect provider to complete the physical connection.
Which two actions can accomplish this? (Choose two.)
- A. Check the email for the account of the NOC contact that you specified during the ordering process.
- B. Contact your cross-connect provider and inform them that Google automatically sent the LOA/CFA to them via email, and to complete the connection.
- C. Run gcloud compute interconnects describe <interconnect>.
- D. Download the LOA-CFA from the Hybrid Connectivity section of the GCP Console.
- E. Open a Cloud Support ticket under the Cloud Interconnect category.
Answer: A,B
NEW QUESTION # 44
Your organization has a single project that contains multiple Virtual Private Clouds (VPCs). You need to secure API access to your Cloud Storage buckets and BigQuery datasets by allowing API access only from resources in your corporate public networks. What should you do?
- A. Create a firewall rule to block API access to Cloud Storage and BigQuery from unauthorized networks.
- B. Create an access context policy that allows your VPC and corporate public network IP ranges, and then attach the policy to Cloud Storage and BigQuery.
- C. Create a VPC Service Controls perimeter for each VPC with an access context policy that allows your corporate public network IP ranges.
- D. Create a VPC Service Controls perimeter for your project with an access context policy that allows your corporate public network IP ranges.
Answer: D
NEW QUESTION # 45
You have a storage bucket that contains two objects. Cloud CDN is enabled on the bucket, and both objects have been successfully cached. Now you want to make sure that one of the two objects will not be cached anymore, and will always be served to the internet directly from the origin.
What should you do?
- A. Ensure that the object you don't want to be cached anymore is not shared publicly.
- B. Create a new storage bucket, and move the object you don't want to be checked anymore inside it. Then edit the bucket setting and enable the privateattribute.
- C. Add an appropriate lifecycle rule on the storage bucket containing the two objects.
- D. Add a Cache-Controlentry with value private to the metadata of the object you don't want to be cached anymore. Invalidate all the previously cached copies.
Answer: A
Explanation:
Explanation/Reference: https://developers.google.com/web/ilt/pwa/caching-files-with-service-worker
NEW QUESTION # 46
You are designing an IP address scheme for new private Google Kubernetes Engine (GKE) clusters. Due to IP address exhaustion of the RFC 1918 address space In your enterprise, you plan to use privately used public IP space for the new clusters. You want to follow Google-recommended practices. What should you do after designing your IP scheme?
- A. Create privately used public IP primary and secondary subnet ranges for the clusters. Create a private GKE cluster With the following options selected --disable-default-snat, -enable-ip-alias, and-enable-private-nodes
- B. Create privately used public IP primary and secondary subnet ranges for the clusters. Create a private GKE cluster with the following options selected and
- C. Create the minimum usable RFC 1918 primary and secondary subnet IP ranges for the clusters Re-use the secondary address range for the services across multiple private GKE clusters
- D. Create the minimum usable RFC 1918 primary and secondary subnet IP ranges for the clusters. Re-use the secondary address range for the pods across multiple private GKE clusters
Answer: A
Explanation:
This answer follows the Google-recommended practices for using privately used public IP (PUPI) addresses for GKE Pod address blocks1. The benefits of this approach are:
It allows you to use any public IP addresses that are not owned by Google or your organization for your Pods, which can help mitigate address exhaustion in your enterprise.
It prevents any external traffic from reaching your Pods, as Google Cloud does not route PUPI addresses to the internet or to other VPC networks by default.
It enables you to use VPC Network Peering to connect your GKE cluster to other VPC networks that use different PUPI addresses, as long as you enable the export and import of custom routes for the peering connection.
It preserves the fully integrated network model of GKE, where Pods can communicate with nodes and other resources in the same VPC network without NAT.
The options that you need to select when creating a private GKE cluster with PUPI addresses are:
-disable-default-snat: This option disables source NAT for outbound traffic from Pods to destinations outside the cluster's VPC network. This is necessary to prevent Pods from using RFC 1918 addresses as their source IP addresses, which could cause conflicts with other networks that use the same address space2.
-enable-ip-alias: This option enables alias IP ranges for Pods and Services, which allows you to use separate subnet ranges for them. This is required to use PUPI addresses for Pods1.
-enable-private-nodes: This option creates a private cluster, where nodes do not have external IP addresses and can only communicate with the control plane through a private endpoint. This enhances the security and privacy of your cluster3.
Option A is incorrect because it does not use PUPI addresses for Pods, but rather RFC 1918 addresses. This does not solve the problem of address exhaustion in your enterprise. Option B is incorrect because it reuses the secondary address range for Services across multiple private GKE clusters, which could cause IP conflicts and routing issues. Option C is incorrect because it does not specify the options that are needed to create a private GKE cluster with PUPI addresses.
1: Configuring privately used public IPs for GKE | Kubernetes Engine | Google Cloud 2: Using Cloud NAT with GKE | Kubernetes Engine | Google Cloud 3: Private clusters | Kubernetes Engine | Google Cloud
NEW QUESTION # 47
Your team is developing an application that will be used by consumers all over the world. Currently, the application sits behind a global external application load balancer You need to protect the application from potential application-level attacks. What should you do?
- A. Create a VPC Service Controls perimeter with the global external application load balancer as the protected service, and apply it to the backend service
- B. Enable Cloud CDN on the backend service.
- C. Create multiple firewall deny rules to block malicious users, and apply them to the global external application load balancer
- D. Create a Google Cloud Armor security policy With web application firewall rules, and apply the security policy to the backend service.
Answer: D
Explanation:
The correct answer is C because it meets the requirement of protecting the application from potential application-level attacks. Google Cloud Armor security policies are sets of rules that match on attributes from Layer 3 to Layer 7 to protect externally facing applications1. Web application firewall (WAF) rules are predefined rules that detect and mitigate common web attacks such as cross-site scripting (XSS), SQL injection, remote file inclusion, and more2. By applying a Google Cloud Armor security policy with WAF rules to the backend service, you can filter out malicious requests before they reach your application.
Option A is incorrect because Cloud CDN is a content delivery network that caches static content at the edge of Google's network, but it does not provide any protection against application-level attacks3. Option B is incorrect because firewall rules are applied at the VPC network level, not at the load balancer level4. Firewall rules also only match on Layer 3 and 4 attributes, not on Layer 7 attributes that are relevant for application-level attacks4. Option D is incorrect because VPC Service Controls perimeter is a feature that helps you secure your data from unauthorized access by users outside your organization, but it does not protect your application from external attacks.
Reference:
Security policy overview | Google Cloud Armor
Web application firewall (WAF) rules | Google Cloud Armor
Cloud CDN overview | Google Cloud
Using firewall rules | VPC
[VPC Service Controls overview | Google Cloud]
NEW QUESTION # 48
Your end users are located in close proximity to us-east1 and europe-west1. Their workloads need to communicate with each other. You want to minimize cost and increase network efficiency.
How should you design this topology?
- A. Create 2 VPCs, each with their own region and individual subnets. Use external IP addresses on the instances to establish connectivity between these regions.
- B. Create 1 VPC with 2 regional subnets. Create a global load balancer to establish connectivity between the regions.
- C. Create 2 VPCs, each with their own regions and individual subnets. Create 2 VPN gateways to establish connectivity between these regions.
- D. Create 1 VPC with 2 regional subnets. Deploy workloads in these subnets and have them communicate using private RFC1918 IP addresses.
Answer: D
Explanation:
VPC Network Peering enables you to peer VPC networks so that workloads in different VPC networks can communicate in private RFC 1918 space. Traffic stays within Google's network and doesn't traverse the public internet.
NEW QUESTION # 49
You work for a university that is migrating to GCP.
These are the cloud requirements:
* On-premises connectivity with 10 Gbps
* Lowest latency access to the cloud
* Centralized Networking Administration Team
New departments are asking for on-premises connectivity to their projects. You want to deploy the most cost- efficient interconnect solution for connecting the campus to Google Cloud.
What should you do?
- A. Use standalone projects and deploy the VLAN attachments and Interconnects in each of the individual projects.
- B. Use standalone projects, and deploy the VLAN attachments in the individual projects. Connect the VLAN attachment to the standalone projects' Interconnects.
- C. Use Shared VPC, and deploy the VLAN attachments in the service projects. Connect the VLAN attachment to the Shared VPC's host project.
- D. Use Shared VPC, and deploy the VLAN attachments and Interconnect in the host project.
Answer: D
NEW QUESTION # 50
You need to enable Cloud CDN for all the objects inside a storage bucket. You want to ensure that all the object in the storage bucket can be served by the CDN.
What should you do in the GCP Console?
- A. Create a new SSL proxy load balancer, select the storage bucket as a backend, and then enable Cloud CDN on the backend.
- B. Create a new cloud storage bucket, and then enable Cloud CDN on it.
- C. Create a new HTTP load balancer, select the storage bucket as a backend, enable Cloud CDN on the backend, and make sure each object inside the storage bucket is shared publicly.
- D. Create a new TCP load balancer, select the storage bucket as a backend, and then enable Cloud CDN on the backend.
Answer: C
Explanation:
https://cloud.google.com/load-balancing/docs/https/adding-backend-buckets-to-load-balancers#using_cloud_cdn_with_cloud_storage_buckets Cloud CDN needs HTTP(S) Load Balancers and Cloud Storage bucket has to be shared publicly. https://cloud.google.com/cdn/docs/setting-up-cdn-with-bucket
NEW QUESTION # 51
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?
- A. Create a Cloud NAT gateway and Cloud Router in both us-west1 and us-east1.
- B. Create a single global Cloud NAT gateway and global Cloud Router in the VPC.
- C. Create a firewall rule that allows egress to destination 0.0.0.0/0.
- D. Change the instances' network interface external IP address from None to Ephemeral.
Answer: A
NEW QUESTION # 52
You work for a multinational enterprise that is moving to GCP.
These are the cloud requirements:
* An on-premises data center located in the United States in Oregon and New York with Dedicated Interconnects connected to Cloud regions us-west1 (primary HQ) and us-east4 (backup)
* Multiple regional offices in Europe and APAC
* Regional data processing is required in europe-west1 and australia-southeast1
* Centralized Network Administration Team
Your security and compliance team requires a virtual inline security appliance to perform L7 inspection for URL filtering. You want to deploy the appliance in us-west1.
What should you do?
- A. * Create 1 VPC in a Shared VPC Service Project.* Configure a 2-NIC instance in zone us-west1-a in the Service Project.* Attach NIC0 in us-west1 subnet of the Service Project.* Attach NIC1 in us-west1 subnet of the Service Project* Deploy the instance.* Configure the necessary routes and firewall rules to pass traffic through the instance.
- B. * Create 1 VPC in a Shared VPC Host Project.* Configure a 2-NIC instance in zone us-west1-a in the Host Project.* Attach NIC0 in us-west1 subnet of the Host Project.* Attach NIC1 in us-west1 subnet of the Host Project* Deploy the instance.* Configure the necessary routes and firewall rules to pass traffic through the instance.
- C. * Create 2 VPCs in a Shared VPC Host Project.* Configure a 2-NIC instance in zone us-west1-a in the Host Project.* Attach NIC0 in VPC #1 us-west1 subnet of the Host Project.* Attach NIC1 in VPC #2 us-west1 subnet of the Host Project.* Deploy the instance.* Configure the necessary routes and firewall rules to pass traffic through the instance.
- D. * Create 2 VPCs in a Shared VPC Host Project.* Configure a 2-NIC instance in zone us-west1-a in the Service Project.* Attach NIC0 in VPC #1 us-west1 subnet of the Host Project.* Attach NIC1 in VPC #2 us-west1 subnet of the Host Project.* Deploy the instance.* Configure the necessary routes and firewall rules to pass traffic through the instance.
Answer: C
NEW QUESTION # 53
You have created an HTTP(S) load balanced service. You need to verify that your backend instances are responding properly.
How should you configure the health check?
- A. Set request-path to a specific URL used for health checking, and set host to include a custom host header that identifies the health check.
- B. Set request-path to a specific URL used for health checking, and set response to a string that the backend service will always return in the response body.
- C. Set proxy-header to the default value, and set host to include a custom host header that identifies the health check.
- D. Set request-path to a specific URL used for health checking, and set proxy-header to PROXY_V1.
Answer: B
Explanation:
https://cloud.google.com/load-balancing/docs/health-check-concepts#content-based_health_checks
NEW QUESTION # 54
You have an application hosted on a Compute Engine virtual machine instance that cannot communicate with a resource outside of its subnet. When you review the flow and firewall logs, you do not see any denied traffic listed.
During troubleshooting you find:
- Flow logs are enabled for the VPC subnet, and all firewall rules are
set to log.
- The subnetwork logs are not excluded from Stackdriver.
- The instance that is hosting the application can communicate outside
the subnet.
- Other instances within the subnet can communicate outside the subnet.
- The external resource initiates communication.
What is the most likely cause of the missing log lines?
- A. The traffic is matching the expected ingress rule.
- B. The traffic is matching the expected egress rule.
- C. The traffic is not matching the expected ingress rule.
- D. The traffic is not matching the expected egress rule.
Answer: C
NEW QUESTION # 55
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