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Google Professional Cloud Network Engineer Exam Practice Questions (P. 4)

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Question #31
You are using a 10-Gbps direct peering connection to Google together with the gsutil tool to upload files to Cloud Storage buckets from on-premises servers. The on-premises servers are 100 milliseconds away from the Google peering point. You notice that your uploads are not using the full 10-Gbps bandwidth available to you. You want to optimize the bandwidth utilization of the connection.
What should you do on your on-premises servers?
  1. A
    Tune TCP parameters on the on-premises servers.
  2. B
    Compress files using utilities like tar to reduce the size of data being sent.
  3. C
    Remove the -m flag from the gsutil command to enable single-threaded transfers.
  4. D
    Use the perfdiag parameter in your gsutil command to enable faster performance: gsutil perfdiag gs://[BUCKET NAME].

Correct Answer:
A
chatbot-img GPT-4o - Answer
When you're grappling with less-than-optimal bandwidth usage in high-latency connections like the 100ms RTT in your scenario, the TCP window size is typically the culprit. Increasing this window size allows more data to be in transit before requiring an acknowledgment, hence utilizing the bandwidth more efficiently. This tweak is especially crucial in cases where the default settings fail to account for latency implications properly, allowing you to bridge the gap between potential and actual performance. Adjusting TCP parameters including the window size on your on-prem servers should help you make the most out of your 10-Gbps connection.

Question #32
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?
  1. A
    "¢ 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.
  2. B
    "¢ 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.
  3. C
    "¢ 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.
  4. D
    "¢ 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.

Correct Answer:
A
chatbot-img GPT-4o - Answer
Deploying a 2-NIC instance where each NIC is attached to separate VPCs within the same host project, as outlined in answer A, correctly aligns with GCP's requirement that each network interface on an instance must be connected to a different VPC network. This setup is essential for creating a flow of traffic through the virtual security appliance for efficient L7 inspection. Additionally, configuring this in the host project directly corresponds with the requirement for centralized network administration. This approach consolidates control and simplifies management across the organization’s global network infrastructure.

Question #33
You are designing a Google Kubernetes Engine (GKE) cluster for your organization. The current cluster size is expected to host 10 nodes, with 20 Pods per node and 150 services. Because of the migration of new services over the next 2 years, there is a planned growth for 100 nodes, 200 Pods per node, and 1500 services. You want to use VPC-native clusters with alias IP ranges, while minimizing address consumption.
How should you design this topology?
  1. A
    Create a subnet of size/25 with 2 secondary ranges of: /17 for Pods and /21 for Services. Create a VPC-native cluster and specify those ranges.
  2. B
    Create a subnet of size/28 with 2 secondary ranges of: /24 for Pods and /24 for Services. Create a VPC-native cluster and specify those ranges. When the services are ready to be deployed, resize the subnets.
  3. C
    Use gcloud container clusters create [CLUSTER NAME]--enable-ip-alias to create a VPC-native cluster.
  4. D
    Use gcloud container clusters create [CLUSTER NAME] to create a VPC-native cluster.

Correct Answer: A

Question #34
Your company has recently expanded their EMEA-based operations into APAC. Globally distributed users report that their SMTP and IMAP services are slow.
Your company requires end-to-end encryption, but you do not have access to the SSL certificates.
Which Google Cloud load balancer should you use?
  1. A
    SSL proxy load balancer
  2. B
    Network load balancer
  3. C
    HTTPS load balancer
  4. D
    TCP proxy load balancer

Correct Answer: D

Question #35
Your company is working with a partner to provide a solution for a customer. Both your company and the partner organization are using GCP. There are applications in the partner's network that need access to some resources in your company's VPC. There is no CIDR overlap between the VPCs.
Which two solutions can you implement to achieve the desired results without compromising the security? (Choose two.)
  1. A
    VPC peering
  2. B
    Shared VPC
  3. C
    Cloud VPN
  4. D
    Dedicated Interconnect
  5. E
    Cloud NAT

Correct Answer: AC

Question #36
You have a storage bucket that contains the following objects:
[1]
[1]
[1]
[1]
Cloud CDN is enabled on the storage bucket, and all four objects have been successfully cached. You want to remove the cached copies of all the objects with the prefix folder-a, using the minimum number of commands.
What should you do?
  1. A
    Add an appropriate lifecycle rule on the storage bucket.
  2. B
    Issue a cache invalidation command with pattern /folder-a/*.
  3. C
    Make sure that all the objects with prefix folder-a are not shared publicly.
  4. D
    Disable Cloud CDN on the storage bucket. Wait 90 seconds. Re-enable Cloud CDN on the storage bucket.

Correct Answer: B
chatbot-img GPT-4o - Answer
The correct approach to remove cached objects in a Cloud CDN-enabled Google Cloud Storage bucket is by using the cache invalidation feature. Specifically, when you want to target objects with a specific prefix—like "folder-a"—you should issue a cache invalidation command using the pattern "/folder-a/*." This pattern ensures that all objects starting with "folder-a" are invalidated, thereby effectively removing them from the cache without altering the actual objects in the storage bucket. This method is both direct and adheres to Google Cloud's recommended practices for managing cache content.

Question #37
Your company is running out of network capacity to run a critical application in the on-premises data center. You want to migrate the application to GCP. You also want to ensure that the Security team does not lose their ability to monitor traffic to and from Compute Engine instances.
Which two products should you incorporate into the solution? (Choose two.)
  1. A
    VPC flow logs
  2. B
    Firewall logs
  3. C
    Cloud Audit logs
  4. D
    Stackdriver Trace
  5. E
    Compute Engine instance system logs

Correct Answer: AB

Question #38
You want to apply a new Cloud Armor policy to an application that is deployed in Google Kubernetes Engine (GKE). You want to find out which target to use for your Cloud Armor policy.
Which GKE resource should you use?
  1. A
    GKE Node
  2. B
    GKE Pod
  3. C
    GKE Cluster
  4. D
    GKE Ingress

Correct Answer: D

Question #39
You need to establish network connectivity between three Virtual Private Cloud networks, Sales, Marketing, and Finance, so that users can access resources in all three VPCs. You configure VPC peering between the Sales VPC and the Finance VPC. You also configure VPC peering between the Marketing VPC and the
Finance VPC. After you complete the configuration, some users cannot connect to resources in the Sales VPC and the Marketing VPC. You want to resolve the problem.
What should you do?
  1. A
    Configure VPC peering in a full mesh.
  2. B
    Alter the routing table to resolve the asymmetric route.
  3. C
    Create network tags to allow connectivity between all three VPCs.
  4. D
    Delete the legacy network and recreate it to allow transitive peering.

Correct Answer:
A

Question #40
You create multiple Compute Engine virtual machine instances to be used at TFTP servers.
Which type of load balancer should you use?
  1. A
    HTTP(S) load balancer
  2. B
    SSL proxy load balancer
  3. C
    TCP proxy load balancer
  4. D
    Network load balancer

Correct Answer:
D

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