A producer created a service attachment in us-central1. A consumer in europe-west1 attempts to create a PSC endpoint referencing that service attachment in europe-west1. What is the expected outcome?
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Correct answer: The endpoint creation fails because service attachments are regional and must be used from the same region as the attachment.
Why this is the answer
Service attachments for Private Service Connect (PSC) are regional resources. This means a service attachment created in us-central1 can only be accessed by PSC endpoints created within the us-central1 region. Attempting to create an endpoint in europe-west1 that references a service attachment in us-central1 will result in failure due to this regional constraint. Google Cloud does not automatically route PSC traffic across regions for service attachments. VPC peering is not a substitute for PSC's regional access model, and Private Google Access is for internal VM access to Google APIs, not for cross-region PSC connections.
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