Exam Professional Cloud Network Engineer topic 1 question 138 discussion

B is is

Analyzing Both Options 🔹 Option C: Private Google Access (restricted.googleapis.com) ✅ Google-recommended method for Cloud Storage over Interconnect. ✅ Easier to configure with VPC routes and DNS. ✅ Used when VMs only have private IPs and need access via Interconnect. ✅ More scalable and widely used. 🔹 Option B: Private Service Connect (PSC) for Cloud Storage ✅ Allows private, direct connections to specific Google services. ✅ Works for Cloud Storage but requires setting up PSC endpoints. ✅ More complex to configure than restricted.googleapis.com. What Do Google’s Official Docs Say? Google recommends using restricted.googleapis.com for Cloud Storage over Interconnect unless you specifically require PSC for other reasons. PSC is usually better suited for private connectivity to managed services like Cloud SQL, rather than Cloud Storage.

C is correct Answer.

To ensure that traffic to Cloud Storage is routed through the Interconnect links while other Google APIs and services use the public internet, you can leverage Private Service Connect. This allows private access to services like Cloud Storage through your VPC while still enabling other services to use public IPs. Thus, B is the most suitable and effective approach.

Based on this doc: https://cloud.google.com/vpc/docs/private-service-connect#endpoints "Private Service Connect endpoint can be used to access Google APIs such as Cloud Storage or BigQuery. This functionality is similar to Private Google Access, except that you can use your own internal IP addresses for endpoints." private.googleapis.com can't be reached through the internet since it's just reached within Google Cloud Networks

private service connects can provide private access to CS but is generally for managed service only, not for access storage buckets directly. C - with restricted.googleapis.com virtual IP addresses for Cloud Storage --> send traffic to Cloud Storage only through the Interconnect links -private.googleapis.com for all other Google APIs and services --> for accessing other Google APIs and services over the public internet

C Private Google Access: Private Google Access ensures that traffic to Google APIs and services originates from your private VPC network without requiring public IPs. restricted.googleapis.com: The restricted.googleapis.com domain ensures that traffic is routed exclusively over Cloud Interconnect for Google APIs and services, such as Cloud Storage. private.googleapis.com: The private.googleapis.com domain allows access to Google APIs and services over the public internet but only from private IP addresses in your VPC. Why This Works: Using restricted.googleapis.com for Cloud Storage ensures traffic to Cloud Storage is sent only through the Cloud Interconnect links. Using private.googleapis.com for other APIs ensures these APIs are accessible over the public internet, aligning with your requirements.

I think B is correct answer as per following: I doubted that how to connect from on-prem, but, it's described by following on the docs: Direct on-premises traffic to specific IP addresses and regions when accessing Google APIs. https://cloud.google.com/vpc/docs/private-service-connect#google-apis

Option B because Private service connect option can allow us to select specific google services to which we want to connect privately. Option C is also technically correct but question demands rest all API should go over the internet which is not possible in this Options.

this is the common case for PGA for on-premise

• B. Use Private Service Connect ***** to access Cloud Storage, and use the default public domains for all other Google APIs and services. Private Service Connect Private Service Connect allows private consumption of services across VPC networks that belong to different groups, teams, projects, or organizations. You can publish and consume services using IP addresses that you define and that are internal to your VPC network. You can use Private Service Connect to access Google APIs and services, or managed services in another VPC network.

B is correct.