Authentic Google Professional-Cloud-Network-Engineer Exam Questions with Answers

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

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

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Google Cloud Certified - Professional Cloud Network Engineer Sample Questions (Q68-Q73):

NEW QUESTION # 68
Your organization, TerramEarth, is launching a global application to manage credit card payments. There are some client VMs inside the same VPC as the application that need to access this application privately. Due to compliance requirements, the internal clients cannot use the global external IP address of the application. Currently, Cloud DNS only resolves myglobalapp.terramearth.com to the public IP address with a public zone. The clients will need to reach myglobalapp.example.com, without using its external IP address. You need to configure Cloud DNS to follow this requirement while following Google-recommended practices. What should you do?

A. Create a sub-domain named internal.terramearth.com. Add the new DNS entry (myglobalapp.internal.terramearth.com) to the sub-domain pointing to the internal IP address from the application VM.
B. Promote the ephemeral IP address from the application VM to static, add this static ip address to each internal client's host file, and change the myglobalapp.terramearth.com DNS record to this new static IP address.
C. Configure a private zone for the application record (myglobalapp.terramearth.com) and point to the internal IP address of the application VM. Bind this zone to the VPC.
D. Configure a query logic script inside Cloud DNS to check the source IP address from the VPC, and respond with a modified DNS record to include the internal IP address from the application VM.

Answer: C

Explanation:
To meet the compliance requirement of using private connectivity for internal clients while adhering to Google-recommended practices:
- Create a private DNS zone in Cloud DNS for myglobalapp.terramearth.com and define an A record that resolves to the internal IP address of the application VM.
- Bind the private zone to the VPC where the internal clients and the application reside. This ensures that DNS queries from VMs in the VPC resolve myglobalapp.terramearth.com to the private IP address instead of the public IP address.
- With this setup, internal clients can access the application privately using its domain name while the public zone remains untouched for external users.

NEW QUESTION # 69
You are disabling DNSSEC for one of your Cloud DNS-managed zones. You removed the DS records from your zone file, waited for them to expire from the cache, and disabled DNSSEC for the zone. You receive reports that DNSSEC validating resolves are unable to resolve names in your zone.
What should you do?

A. Update the TTL for the zone.
B. Disable DNSSEC at your domain registar.
C. Set the zone to the TRANSFER state.
D. Transfer ownership of the domain to a new registar.

Answer: B

Explanation:
Before disabling DNSSEC for a managed zone you want to use, you must deactivate DNSSEC at your domain registrar to ensure that DNSSEC-validating resolvers can still resolve names in the zone.
https://cloud.google.com/dns/docs/dnssec-config

NEW QUESTION # 70
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?

A. 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.
B. 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.
C. Use gcloud container clusters create [CLUSTER NAME] to create a VPC-native cluster.
D. Use gcloud container clusters create [CLUSTER NAME]--enable-ip-alias to create a VPC-native cluster.

Answer: B

Explanation:
The service range setting is permanent and cannot be changed. Please see https://stackoverflow.com/questions/60957040/how-to-increase-the-service-address-range-of-a-gke-cluster I think the correc tanswer is A since: Grow is expected to up to 100 nodes (that would be /25), then up to 200 pods per node (100 times 200 = 20000 so /17 is 32768), then 1500 services in a /21 (up to 2048)
https://docs.netgate.com/pfsense/en/latest/book/network/understanding-cidr-subnet-mask-notation.html

NEW QUESTION # 71
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 instance-tags, and create a filter for TCP traffic.
B. 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.
C. 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
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 subnets, and create a filter for TCP traffic

Answer: C

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 # 72
You want to configure a NAT to perform address translation between your on-premises network blocks and GCP.
Which NAT solution should you use?

A. An instance with IP forwarding enabled
B. An instance configured with iptables SNAT rules
C. An instance configured with iptables DNAT rules
D. Cloud NAT

Answer: D

Explanation:
https://cloud.google.com/nat/docs/overview

NEW QUESTION # 73
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