2024年最新の100%試験高合格率Professional-Cloud-Network-Engineer問題集PDF
合格させる試験完全版Professional-Cloud-Network-Engineer問題集175解答
質問 # 54
You need to configure the Border Gateway Protocol (BGP) session for a VPN tunnel you just created between two Google Cloud VPCs, 10.1.0.0/16 and 172.16.0.0/16. You have a Cloud Router (router-1) in the 10.1.0.0/16 network and a second Cloud Router (router-2) in the 172.16.0.0/16 network. Which configuration should you use for the BGP session?
- A.
- B.
- C.
- D.
正解：C
質問 # 55
You want to set up two Cloud Routers so that one has an active Border Gateway Protocol (BGP) session, and the other one acts as a standby.
Which BGP attribute should you use on your on-premises router?
- A. Community
- B. AS-Path
- C. Local Preference
- D. Multi-exit Discriminator
正解：D
解説：
Explanation/Reference: https://cloud.google.com/router/docs/concepts/overview
質問 # 56
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 responseto a string that the backend service will always return in the response body.
- B. Set request-pathto a specific URL used for health checking, and set proxy-headerto PROXY_V1.
- C. Set proxy-header to the default value, and set hostto include a custom host header that identifies the health check.
- D. Set request-path to a specific URL used for health checking, and set hostto include a custom host header that identifies the health check.
正解：D
解説：
Explanation/Reference: https://cloud.google.com/load-balancing/docs/health-checks
質問 # 57
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. Disable DNSSEC at your domain registar.
- B. Update the TTL for the zone.
- C. Set the zone to the TRANSFER state.
- D. Transfer ownership of the domain to a new registar.
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.
正解：A
質問 # 58
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?
- A. Delete the legacy network and recreate it to allow transitive peering.
- B. Configure VPC peering in a full mesh.
- C. Alter the routing table to resolve the asymmetric route.
- D. Create network tags to allow connectivity between all three VPCs.
正解：B
質問 # 59
Your company recently migrated to Google Cloud in a Single region. You configured separate Virtual Private Cloud (VPC) networks for two departments. Department A and Department B. Department A has requested access to resources that are part Of Department Bis VPC. You need to configure the traffic from private IP addresses to flow between the VPCs using multi-NIC virtual machines (VMS) to meet security requirements Your configuration also must
* Support both TCP and UDP protocols
* Provide fully automated failover
* Include health-checks
Require minimal manual Intervention In the client VMS
Which approach should you take?
- A. Create an Instance template and a managed instance group. Configure a Single internal load balancer, and define a custom static route with the Internal TCP/UDP load balancer as the next hop
- B. Create an instance template and a managed instance group. Configure two separate internal TCP/IJDP load balancers for each protocol (TCP!UDP), and configure the client VIVIS to use the internal load balancers' virtual IP addresses
- C. Create the VMS in different zones, and configure static routes with instance names as next hops
- D. Create the VMS In the same zone, and configure static routes With IP addresses as next hops.
正解：B
解説：
The correct answer is D. Create an instance template and a managed instance group. Configure two separate internal TCP/UDP load balancers for each protocol (TCP/UDP), and configure the client VMs to use the internal load balancers' virtual IP addresses.
This answer is based on the following facts:
Using multi-NIC VMs as network virtual appliances (NVAs) allows you to route traffic between different VPC networks1. You can use NVAs to implement custom network policies and security requirements.
Using an instance template and a managed instance group allows you to create and manage multiple identical NVAs2. You can also use health checks and autoscaling policies to ensure high availability and reliability of your NVAs.
Using internal TCP/UDP load balancers allows you to distribute traffic from client VMs to NVAs based on the protocol and port3. You can also use health checks and failover policies to ensure that only healthy NVAs receive traffic.
Configuring the client VMs to use the internal load balancers' virtual IP addresses allows you to simplify the routing configuration and avoid manual intervention4. You do not need to create static routes or update them when NVAs are added or removed.
The other options are not correct because:
Option A is not suitable. Creating the VMs in the same zone does not provide high availability or failover. Using static routes with IP addresses as next hops requires manual intervention when NVAs are added or removed.
Option B is not optimal. Creating the VMs in different zones provides high availability, but not failover. Using static routes with instance names as next hops requires manual intervention when NVAs are added or removed.
Option C is not feasible. Creating an instance template and a managed instance group provides high availability and reliability, but using a single internal load balancer does not support both TCP and UDP protocols. You cannot define a custom static route with an internal load balancer as the next hop.
質問 # 60
You are increasing your usage of Cloud VPN between on-premises and GCP, and you want to support more traffic than a single tunnel can handle. You want to increase the available bandwidth using Cloud VPN.
What should you do?
- A. Create two VPN tunnels on the same Cloud VPN gateway that point to the same destination VPN gateway IP address.
- B. Double the MTU on your on-premises VPN gateway from 1460 bytes to 2920 bytes.
- C. Add a second Cloud VPN gateway in a different region than the existing VPN gateway.
Create a new tunnel on the second Cloud VPN gateway that forwards the same IP range, but points to the existing on-premises VPN gateway IP address. - D. Add a second on-premises VPN gateway with a different public IP address.
Create a second tunnel on the existing Cloud VPN gateway that forwards the same IP range, but points at the new on-premises gateway IP.
正解：A
解説：
https://cloud.google.com/vpn/docs/concepts/classic-topologies
質問 # 61
You want to use Cloud Interconnect to connect your on-premises network to a GCP VPC. You cannot meet Google at one of its point-of-presence (POP) locations, and your on-premises router cannot run a Border Gateway Protocol (BGP) configuration.
Which connectivity model should you use?
- A. Partner Interconnect with a layer 3 partner
- B. Direct Peering
- C. Dedicated Interconnect
- D. Partner Interconnect with a layer 2 partner
正解：A
解説：
https://cloud.google.com/network-connectivity/docs/interconnect/concepts/partner-overview For Layer 3 connections, your service provider establishes a BGP session between your Cloud Routers and their edge routers for each VLAN attachment. You don't need to configure BGP on your on-premises router. Google and your service provider automatically set the correct configurations.
https://cloud.google.com/network-connectivity/docs/interconnect/concepts/partner-overview#connectivity-type
質問 # 62
Your company's web server administrator is migrating on-premises backend servers for an application to GCP. Libraries and configurations differ significantly across these backend servers. The migration to GCP will be lift-and-shift, and all requests to the servers will be served by a single network load balancer frontend. You want to use a GCP-native solution when possible.
How should you deploy this service in GCP?
- A. Use GCP's ECMP capability to load-balance traffic to the backend servers by installing multiple equal-priority static routes to the backend servers.
- B. Create a managed instance group from one of the images of the on-premises servers, and link this instance group to a target pool behind your load balancer.
- C. Deploy a third-party virtual appliance as frontend to these servers that will accommodate the significant differences between these backend servers.
- D. Create a target pool, add all backend instances to this target pool, and deploy the target pool behind your load balancer.
正解：D
質問 # 63
You are designing the network architecture for your organization. Your organization has three developer teams: Web, App, and Database. All of the developer teams require access to Compute Engine instances to perform their critical tasks. You are part of a small network and security team that needs to provide network access to the developers. You need to maintain centralized control over network resources, including subnets, routes, and firewalls. You want to minimize operational overhead. How should you design this topology?
- A. Configure one VPC for Web, one VPC for App, and one VPC for Database. Use VPC Network Peering to connect all VPCs in a full mesh.
- B. Configure three Shared VPC host projects, each with a service project: one for Web, one for App, and one for Database.
- C. Configure one VPC for Web, one VPC for App, and one VPC for Database. Configure HA VPN between each VPC.
- D. Configure a host project with a Shared VPC. Create service projects for Web, App, and Database.
正解：B
質問 # 64
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. Run gcloud compute interconnects describe <interconnect>.
- 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. Download the LOA-CFA from the Hybrid Connectivity section of the GCP Console.
- D. Check the email for the account of the NOC contact that you specified during the ordering process.
- E. Open a Cloud Support ticket under the Cloud Interconnect category.
正解：B、D
解説：
https://cloud.google.com/network-connectivity/docs/interconnect/how-to/dedicated/retrieving-loas
質問 # 65
In order to provide subnet level isolation, you want to force instance-A in one subnet to route through a security appliance, called instance-B, in another subnet.
What should you do?
- A. Delete the system-generated subnet route and create a specific route to instance-B with a tag applied to instance-A.
- B. Create a more specific route than the system-generated subnet route, pointing the next hop to instance-B with a tag applied to instance-A.
- C. Move instance-B to another VPC and, using multi-NIC, connect instance-B's interface to instance-A's network. Configure the appropriate routes to force traffic through to instance-A.
- D. Create a more specific route than the system-generated subnet route, pointing the next hop to instance-B with no tag.
正解：B
質問 # 66
You need to define an address plan for a future new GKE cluster in your VPC. This will be a VPC native cluster, and the default Pod IP range allocation will be used. You must pre-provision all the needed VPC subnets and their respective IP address ranges before cluster creation. The cluster will initially have a single node, but it will be scaled to a maximum of three nodes if necessary. You want to allocate the minimum number of Pod IP addresses.
Which subnet mask should you use for the Pod IP address range?
- A. /21
- B. /22
- C. /23
- D. /25
正解：B
解説：
https://cloud.google.com/kubernetes-engine/docs/how-to/alias-ips#cluster_sizing_secondary_range_pods Reference:
https://cloud.google.com/kubernetes-engine/docs/how-to/flexible-pod-cidr
https://cloud.google.com/kubernetes-engine/docs/concepts/alias-ips#defaults_limits
質問 # 67
One instance in your VPC is configured to run with a private IP address only. You want to ensure that even if this instance is deleted, its current private IP address will not be automatically assigned to a different instance.
In the GCP Console, what should you do?
- A. Add custom metadata to the instance with key internal-address and value reserved.
- B. Change the instance's current internal IP address to static.
- C. Assign a new reserved internal IP address to the instance.
- D. Assign a public IP address to the instance.
正解：B
解説：
https://cloud.google.com/compute/docs/ip-addresses/reserve-static-internal-ip-address#reservenewip Since here https://cloud.google.com/compute/docs/ip-addresses/reserve-static-internal-ip-address#reservenewip it is written that "automatically allocated or an unused address from an existing subnet".
質問 # 68
You have configured Cloud CDN using HTTP(S) load balancing as the origin for cacheable content. Compression is configured on the web servers, but responses served by Cloud CDN are not compressed.
What is the most likely cause of the problem?
- A. The web servers behind the load balancer are configured with different compression types.
- B. You have configured the web servers and Cloud CDN with different compression types.
- C. You have not configured compression in Cloud CDN.
- D. You have to configure the web servers to compress responses even if the request has a Via header.
正解：D
解説：
If responses served by Cloud CDN are not compressed but should be, check that the web server software running on your instances is configured to compress responses. By default, some web server software will automatically disable compression for requests that include a Via header. The presence of a Via header indicates the request was forwarded by a proxy. HTTP proxies such as HTTP(S) load balancing add a Via header to each request as required by the HTTP specification. To enable compression, you may have to override your web server's default configuration to tell it to compress responses even if the request had a Via header.
質問 # 69
Your company has a single Virtual Private Cloud (VPC) network deployed in Google Cloud with access from on-premises locations using Cloud Interconnect connections. Your company must be able to send traffic to Cloud Storage only through the Interconnect links while accessing other Google APIs and services over the public internet. What should you do?
- A. Use Private Google Access, with restricted.googleapis.com virtual IP addresses for Cloud Storage and private.googleapis.com for all other Google APIs and services.
- B. Use Private Google Access, with private.googleapis.com virtual IP addresses for Cloud Storage and restricted.googleapis.com virtual IP addresses for all other Google APIs and services.
- C. Use Private Service Connect to access Cloud Storage, and use the default public domains for all other Google APIs and services.
- D. Use the default public domains for all Google APIs and services.
正解：C
質問 # 70
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