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Professional Cloud Network Engineer Exam Dumps

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Professional Cloud Network Engineer

A Professional Cloud Network Engineer implements and manages network architectures in Google Cloud Platform. This individual has at least 1 year of hands-on experience working with Google Cloud Platform and may work on networking or cloud teams with architects who design the infrastructure. By leveraging experience implementing VPCs, hybrid connectivity, network services, and security for established network architectures, this individual ensures successful cloud implementations using the command line interface or the Google Cloud Platform Console.

The Professional Cloud Network Engineer exam assesses your ability to:

- Design, plan, and prototype a GCP Network

- Implement a GCP Virtual Private Cloud (VPC)

- Configure network services

- Implement hybrid interconnectivity

- Implement network security

1. Designing, planning, and prototyping a GCP network

1.1 Designing the overall network architecture. Considerations include:

- Failover and disaster recovery strategy

- Options for high availability

- DNS strategy (e.g., on-premises, Cloud DNS, GSLB)

- Meeting business requirements

- Choosing the appropriate load balancing options

- Optimizing for latency (e.g., MTU size, caches, CDN)

- Understanding how quotas are applied per project and per VPC

- Hybrid connectivity (e.g., Google private access for hybrid connectivity)

- Container networking

- IAM and security

- SaaS, PaaS, and IaaS services

- Microsegmentation for security purposes (e.g., using metadata, tags)

1.2 Designing a Virtual Private Cloud (VPC). Considerations include:

- CIDR range for subnets

- IP addressing (e.g., static, ephemeral, private)

- Standalone or shared

- Multiple vs. single

- Multi-zone and multi-region

- Peering

- Firewall (e.g., service account–based, tag-based)

- Routes

- Differences between Google Cloud Networking and other cloud platforms

1.3 Designing a hybrid network. Considerations include:

- Using interconnect (e.g., dedicated vs. partner)

- Peering options (e.g., direct vs. carrier)

- IPsec VPN

- Cloud Router

- Failover and disaster recovery strategy (e.g., building high availability with BGP using cloud router)

- Shared vs. standalone VPC interconnect access

- Cross-organizational access

- Bandwidth

1.4 Designing a container IP addressing plan for Google Kubernetes Engine

2. Implementing a GCP Virtual Private Cloud (VPC)

2.1 Configuring VPCs. Considerations include:

- Configuring GCP VPC resources (CIDR range, subnets, firewall rules, etc.)

- Configuring VPC peering

- Creating a shared VPC and explaining how to share subnets with other projects

- Configuring API access (private, public, NAT GW, proxy)

- Configuring VPC flow logs

2.2 Configuring routing. Tasks include:

- Configuring internal static/dynamic routing

- Configuring routing policies using tags and priority

- Configuring NAT (e.g., Cloud NAT, instance-based NAT)

2.3 Configuring and maintaining Google Kubernetes Engine clusters. Considerations include:

- VPC-native clusters using alias IPs

- Clusters with shared VPC

- Private clusters

- Cluster network policy

- Adding authorized networks for cluster master access

2.4 Configuring and managing firewall rules. Considerations include:

- Target network tags and service accounts

- Priority

- Network protocols

- Ingress and egress rules

- Firewall logs

3. Configuring network services

3.1 Configuring load balancing. Considerations include:

- Creating backend services

- Firewall and security rules

- HTTP(S) load balancer: including changing URL maps, backend groups, health checks, CDN, and SSL certs

- TCP and SSL proxy load balancers

- Network load balancer

- Internal load balancer

- Session affinity

- Capacity scaling

3.2 Configuring Cloud CDN. Considerations include:

- Enabling and disabling Cloud CDN

- Using cache keys

- Cache invalidation

- Signed URLs

3.3 Configuring and maintaining Cloud DNS. Considerations include:

- Managing zones and records

- Migrating to Cloud DNS

- DNS Security (DNSSEC)

- Global serving with Anycast

- Cloud DNS

- Internal DNS

- Integrating on-premises DNS with GCP

3.4 Enabling other network services. Considerations include:

- Health checks for your instance groups

- Canary (A/B) releases

- Distributing backend instances using regional managed instance groups

- Enabling private API access

4. Implementing hybrid interconnectivity

4.1 Configuring interconnect. Considerations include:

- Partner (e.g., layer 2 vs. layer 3 connectivity)

- Virtualizing using VLAN attachments

- Bulk storage uploads

4.2 Configuring a site-to-site IPsec VPN (e.g., route-based, policy-based, dynamic or static routing).

4.3 Configuring Cloud Router for reliability.

5. Implementing network security

5.1 Configuring identity and access management (IAM). Tasks include:

- Viewing account IAM assignments

- Assigning IAM roles to accounts or Google Groups

- Defining custom IAM roles

- Using pre-defined IAM roles (e.g., network admin, network viewer, network user)

5.2 Configuring Cloud Armor policies. Considerations include:

- IP-based access control

5.3 Configuring third-party device insertion into VPC using multi-nic (NGFW)

5.4 Managing keys for SSH access

6. Managing and monitoring network operations

6.1 Logging and monitoring with Stackdriver or GCP Console

6.2 Managing and maintaining security. Considerations include:

- Firewalls (e.g., cloud-based, private)

- Diagnosing and resolving IAM issues (shared VPC, security/network admin)

6.3 Maintaining and troubleshooting connectivity issues. Considerations include:

- Identifying traffic flow topology (e.g., load balancers, SSL offload, network endpoint groups)

- Draining and redirecting traffic flows

- Cross-connect handoff for interconnect

- Monitoring ingress and egress traffic using flow logs

- Monitoring firewall logs

- Managing and troubleshooting VPNs

- Troubleshooting Cloud Router BGP peering issues

6.4 Monitoring, maintaining, and troubleshooting latency and traffic flow. Considerations include:

- Network throughput and latency testing

- Routing issues

- Tracing traffic flow

7. Optimizing network resources

7.1 Optimizing traffic flow. Considerations include:

- Load balancer and CDN location

- Global vs. regional dynamic routing

- Expanding subnet CIDR ranges in service

- Accommodating workload increases (e.g., autoscaling vs. manual scaling)

7.2 Optimizing for cost and efficiency. Considerations include:

- Cost optimization (Network Service Tiers, Cloud CDN, autoscaler [max instances])

- Automation

- VPN vs. interconnect

- Bandwidth utilization (e.g., kernel sys tuning parameters)

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Google-PCNE PDF Sample Questions

Google-PCNE Sample Questions

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Professional Cloud Network Engineer
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Question: 59
You want to create a service in GCP using IPv6.
What should you do?
A. Create the instance with the designated IPv6 address.
B. Configure a TCP Proxy with the designated IPv6 address.
C. Configure a global load balancer with the designated IPv6 address.
D. Configure an internal load balancer with the designated IPv6 address.
Answer: B
Question: 60
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?
A. Security Admin privileges from the Shared VPC Admin.
B. Service Project Admin privileges from the Shared VPC Admin.
C. Shared VPC Admin privileges from the Organization Admin.
D. Organization Admin privileges from the Organization Admin.
Answer: A
Reference: https://cloud.google.com/vpc/docs/shared-vpc
Question: 61
You have deployed a new internal application that provides HTTP and TFTP services to on-premises hosts. You want to be able
to distribute traffic across multiple Compute Engine instances, but need to ensure that clients are sticky to a particular instance
across both services.
Which session affinity should you choose?
A. None
B. Client IP
C. Client IP and protocol
D. Client IP, port and protocol
Answer: B
Question: 62
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?
A. Check the VPC flow logs for the instance.
B. Try connecting to the instance via SSH, and check the logs.
C. Create a new firewall rule to allow traffic from port 22, and enable logs.
D. Create a new firewall rule with priority 65500 to deny all traffic, and enable logs.
Answer: A
Question: 63
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 Shared VPC, and deploy the VLAN attachments and Interconnect in the host project.
B. Use Shared VPC, and deploy the VLAN attachments in the service projects. Connect the VLAN attachment to
the Shared VPC�s host project.
C. Use standalone projects, and deploy the VLAN attachments in the individual projects. Connect the VLAN
attachment to the standalone projects� Interconnects.
D. Use standalone projects and deploy the VLAN attachments and Interconnects in each of the individual projects.
Answer: A
Question: 64
You are using a third-party next-generation firewall to inspect traffic. You created a custom route of 0.0.0.0/0 to route egress
traffic to the firewall. You want to allow your VPC instances without public IP addresses to access the BigQuery and Cloud
Pub/Sub APIs, without sending the traffic through the firewall.
Which two actions should you take? (Choose two.)
A. Turn on Private Google Access at the subnet level.
B. Turn on Private Google Access at the VPC level.
C. Turn on Private Services Access at the VPC level.
D. Create a set of custom static routes to send traffic to the external IP addresses of Google APIs and services via
the default internet gateway.
E. Create a set of custom static routes to send traffic to the internal IP addresses of Google APIs and services via
the default internet gateway.
Answer: CE
Reference: https://cloud.google.com/vpc/docs/private-access-options
Question: 65
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. Open the Cloud Shell SSH into the instance using gcloud compute 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. 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.
Answer: B
Reference: https://cloud.google.com/compute/docs/storing-retrieving-metadata
Question: 66
You are migrating to Cloud DNS and want to import your BIND zone file.
Which command should you use?
A. gcloud dns record-sets import ZONE_FILE �zone MANAGED_ZONE
B. gcloud dns record-sets import ZONE_FILE �replace-origin-ns �zone MANAGED_ZONE
C. gcloud dns record-sets import ZONE_FILE �zone-file-format �zone MANAGED_ZONE
D. gcloud dns record-sets import ZONE_FILE �delete-all-existing �zone MANAGED ZONE
Answer: C
Once you have the exported file from your other provider, you can use the gcloud dns record-sets import command to
import it into your managed zone.
To import record-sets, you use the dns record-sets import command. The �zone-file-format flag tells importto expect a
BIND zone formatted file. If you omit this flag, import expects a YAML-formatted records file.
Reference: https://medium.com/@prashantapaudel/gcp-certification-series-2-4-planning-and-configuring-network-
resources-8045ac2cc2ac
Question: 67
You created a VPC network named Retail in auto mode. You want to create a VPC network named Distribution and peer it with
the Retail VPC.
How should you configure the Distribution VPC?
A. Create the Distribution VPC in auto mode. Peer both the VPCs via network peering.
B. Create the Distribution VPC in custom mode. Use the CIDR range 10.0.0.0/9. Create the necessary subnets, and
then peer them via network peering.
C. Create the Distribution VPC in custom mode. Use the CIDR range 10.128.0.0/9. Create the necessary subnets,
and then peer them via network peering.
D. Rename the default VPC as "Distribution" and peer it via network peering.
Answer: B
Reference: https://cloud.google.com/vpc/docs/using-vpc
Question: 68
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 regions and individual subnets. Create 2 VPN gateways to establish
connectivity between these regions.
B. Create 2 VPCs, each with their own region and individual subnets. Use external IP addresses on the instances to
establish connectivity between these regions.
C. Create 1 VPC with 2 regional subnets. Create a global load balancer to establish connectivity between the
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
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. Reference:
https://cloud.google.com/vpc/docs/vpc-peering
Question: 69
Your organization is deploying a single project for 3 separate departments. Two of these departments require network
connectivity between each other, but the third department should remain in isolation. Your design should create separate network
administrative domains between these departments. You want to minimize operational overhead.
How should you design the topology?
A. Create a Shared VPC Host Project and the respective Service Projects for each of the 3 separate departments.
B. Create 3 separate VPCs, and use Cloud VPN to establish connectivity between the two appropriate VPCs.
C. Create 3 separate VPCs, and use VPC peering to establish connectivity between the two appropriate VPCs.
D. Create a single project, and deploy specific firewall rules. Use network tags to isolate access between the
departments.
Answer: A
Use Shared VPC to connect to a common VPC network. Resources in those projects can communicate with each other
securely and efficiently across project boundaries using internal IPs. You can manage shared network resources, such
as subnets, routes, and firewalls, from a central host project, enabling you to apply and enforce consistent network
policies across the projects.
With Shared VPC and IAM controls, you can separate network administration from project administration. This
separation helps you implement the principle of least privilege. For example, a centralized network team can administer
the network without having any permissions into the participating projects. Similarly, the project admins can manage
their project resources without any permissions to manipulate the shared network.
Reference: https://cloud.google.com/docs/enterprise/best-practices-for-enterprise-organizations
Question: 70
You need to restrict access to your Google Cloud load-balanced application so that only specific IP addresses can connect.
What should you do?
A. 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.
B. 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.
C. 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.
D. 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.
Answer: C
Reference: https://link.springer.com/chapter/10.1007/978-1-4842-1004-8_4
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