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

Section	Weight	Objectives
Configuring cloud network security solutions	12%	- Cloud Armor 1. Security policies, WAF rules, DDoS protection - Secure Web Proxy 1. URL filtering, access control - VPC Service Controls 1. Service perimeters, access levels
Designing and planning a Google Cloud VPC network	26%	- Designing overall network architecture 1. Network tiers (Premium/Standard) 2. DNS topology design 3. High availability, disaster recovery, scalability - Designing VPC networks 1. Standalone vs Shared VPC 2. IP address management 3. Subnet design and CIDR planning 4. Private Service Access / Private Service Connect - Designing hybrid and multi-cloud networks 1. Cloud Router and BGP design 2. Cloud Interconnect / Cloud VPN architecture - Designing for GKE networking 1. Alias IP ranges, private control plane
Configuring hybrid and multi-cloud connectivity	14%	- Cloud VPN 1. Site-to-site, HA VPN, policy-based/route-based - Cloud Router 1. BGP configuration, route advertisement - Cloud Interconnect 1. Dedicated, Partner Interconnect, VLAN attachments
Implementing a VPC network	20%	- Hierarchical firewalls and security policies 1. Cloud Next Generation Firewall - Network Connectivity Center 1. Spoke and hub configuration - VPC connectivity 1. VPC Peering, Shared VPC setup 2. Dynamic and static routing - Configuring VPC resources 1. Networks, subnets, firewall rules/policies 2. Private Google Access, service accounts
Configuring managed network services	16%	- Cloud CDN 1. Caching rules, origin configuration - Cloud DNS 1. Public/private zones, forwarding, peering 2. DNSSEC, logging - Cloud NAT 1. Address allocation, port management - Load balancing 1. Backend services, NEGs, health checks 2. Internal/external, regional/global types
Managing, monitoring, and troubleshooting network operations	12%	- Troubleshooting connectivity 1. Load balancer and packet loss diagnosis 2. VPN/Interconnect issues, BGP errors - Monitoring and logging 1. Network Intelligence Center 2. VPC Flow Logs, Firewall Insights 3. Cloud Logging, Cloud Monitoring

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Google Cloud Certified - Professional Cloud Network Engineer 認定 Professional-Cloud-Network-Engineer 試験問題 (Q17-Q22):

質問 # 17
You have an application running on Compute Engine that uses BigQuery to generate some results that are stored in Cloud Storage. You want to ensure that none of the application instances have external IP addresses.
Which two methods can you use to accomplish this? (Choose two.)

A. Create a Cloud NAT, and route the application traffic via NAT gateway.
B. Enable Private Google Access on the VPC.
C. Create network peering between your VPC and BigQuery.
D. Enable Private Services Access on the VPC.
E. Enable Private Google Access on all the subnets.

正解：A、E

解説：
Private Google Access interaction
https://cloud.google.com/nat/docs/overview#interaction-pga
Specifications
https://cloud.google.com/vpc/docs/configure-private-google-access#specifications

質問 # 18
Your company has a web application, app.example.com, hosted on a Compute Engine instance within a Google Cloud VPC. You need to configure DNS so that employees inside the VPC resolve app.example.com to its private IP address, while external users on the internet resolve the same hostname to a public IP address managed by a global external HTTPS Application Load Balancer. Your solution needs to follow Google-recommended practices. What should you do?

A. Create a private Cloud DNS zone for app.example.com, and use a Cloud NAT gateway to translate the private IP to a public IP for external users.
B. Use a Cloud DNS forwarding zone to send all queries for app.example.com from your VPC to an on-premises DNS server that holds the private record.
C. Use Cloud DNS split horizon to create two Cloud DNS zones for app.example.com: a public zone for the public IP and a VPC-authorized private zone for the private IP.
D. Create a single public Cloud DNS zone for app.example.com. Add two 'A' records with the same hostname: one for the public IP and one for the private IP, relying on DNS round-robin.

正解：C

解説：
Google-recommended practice for serving the same hostname differently to internal and external clients is Cloud DNS split horizon. Create a public zone for app.example.com that returns the load balancer's public IP to internet users, and create a private zone for the same name, authorized to the VPC, that returns the internal private IP for employees inside the VPC. This lets the same FQDN resolve differently based on where the query originates.
Reference:
https://docs.cloud.google.com/dns/docs/zones/zones-overview
https://docs.cloud.google.com/dns/docs/dns-overview
https://docs.cloud.google.com/architecture/best-practices-vpc-design

質問 # 19
You want to deploy a VPN Gateway to connect your on-premises network to GCP. You are using a non BGP- capable on-premises VPN device. You want to minimize downtime and operational overhead when your network grows. The device supports only IKEv2, and you want to follow Google-recommended practices.
What should you do?

A. * Create a Cloud VPN instance.
* Create a route-based VPN tunnel.
* Configure the appropriate local and remote traffic selectors to 0.0.0.0/0.
* Configure the appropriate static routes.
B. * Create a Cloud VPN instance.
* Create a policy-based VPN tunnel.
* Configure the appropriate local and remote traffic selectors to match your local and remote networks.
* Configure the appropriate static routes.
C. * Create a Cloud VPN instance.
* Create a route-based VPN tunnel.
* Configure the appropriate local and remote traffic selectors to match your local and remote networks.
* Configure the appropriate static routes.
D. * Create a Cloud VPN instance.
* Create a policy-based VPN tunnel per subnet.
* Configure the appropriate local and remote traffic selectors to match your local and remote networks.
* Create the appropriate static routes.

正解：A

解説：
Explanation/Reference: https://cloud.google.com/vpn/docs/concepts/choosing-networks-routing

質問 # 20
Your company is modernizing its infrastructure by expanding its services. You are concerned about the long-term scalability of your network due to IPv4 address exhaustion. You need to design and deploy a new Google Kubernetes Engine (GKE) cluster that allows Pods and Services to communicate over IPv6 while maintaining IPv4 connectivity for backward compatibility with existing systems. What should you do?

A. Deploy a Cloud NAT gateway within your VPC to translate traffic between your existing IPv4-only GKE cluster and external IPv6 clients.
B. Create a new GKE cluster, and enable an IPv6-only node pool.
C. Create a new dual-stack subnet within your VPC, and then create a new GKE cluster within that subnet and specify dual-stack networking mode.
D. Create a new standard GKE cluster, and enable an IPv6-only address range for Pods.

正解：C

解説：
To support both IPv6 and IPv4 for Pods and Services in GKE, you need a dual-stack VPC-native cluster. Google Cloud requires the cluster to be created in a dual-stack subnet and configured for dual-stack networking so nodes, Pods, and Services can receive both IPv4 and IPv6 connectivity for backward compatibility and future scalability.
Reference:
https://docs.cloud.google.com/kubernetes-engine/docs/concepts/alias-ips
https://docs.cloud.google.com/kubernetes-engine/docs/concepts/about-ip-addressing

質問 # 21
You need to configure a static route to an on-premises resource behind a Cloud VPN gateway that is configured for policy-based routing using the gcloud command.
Which next hop should you choose?

A. The IP address of the Cloud VPN gateway
B. The default internet gateway
C. The IP address of the instance on the remote side of the VPN tunnel
D. The name and region of the Cloud VPN tunnel

正解：D

解説：
When you create a route based tunnel using the Cloud Console, Classic VPN performs both of the following tasks: Sets the tunnel's local and remote traffic selectors to any IP address (0.0.0.0/0) For each range in Remote network IP ranges, Google Cloud creates a custom static route whose destination (prefix) is the range's CIDR, and whose next hop is the tunnel. https://cloud.google.com/network-connectivity/docs/vpn
/how-to/creating-static-vpns
Reference: https://cloud.google.com/vpn/docs/how-to/creating-static-vpns

質問 # 22
......

Professional-Cloud-Network-Engineerトレーニングクイズが役立つと自信を持って言えます。まず第一に、当社はユーザーのニーズに応じて常に製品を改善しています。学習製品が本当に役立つことを本当に望んでいるなら、私たちのProfessional-Cloud-Network-Engineer学習教材は間違いなくあなたの最良の選択です。あなたはそれより完璧な製品を見つけることはできません。第二に、Professional-Cloud-Network-Engineerの学習に関する質問は多くの人々を本当に助けてくれました。これらの高齢者の経験を見ると、Professional-Cloud-Network-Engineer試験に合格することを強く決意していると思います。

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