A global e-commerce platform needs to serve static assets (images, CSS, JavaScript) to users worldwide with the lowest possible latency and handle…

Cloud CDN (Content Delivery Network) is the purpose-built Google Cloud service for accelerating the delivery of web and video content. It leverages Google's globally distributed edge points of presence to cache content close to users. When a user requests an asset, it is served from the nearest edge cache, which significantly reduces latency. This caching mechanism also absorbs massive traffic spikes by serving content directly from the edge, thereby reducing the load on the origin server (such as a Cloud Storage bucket) and ensuring high availability and performance for a global user base.

A. A multi-region Cloud Storage bucket provides high availability and low-latency access within a large geographic area (e.g., a continent), but it does not use a global edge network for worldwide low-latency delivery.

C. Cloud Filestore is a managed Network File System (NFS) service for applications requiring a shared filesystem. It is a regional service and is not designed for global, public-facing content delivery.

D. While functional, this approach requires significant manual effort to configure, scale, and manage a global fleet of VMs and load balancers, making it less efficient and more complex than a managed CDN service.

1. Google Cloud Documentation, "Cloud CDN overview": "Cloud CDN (Content Delivery Network) uses Google's global edge network to bring content closer to your users. Caching content at the edge of Google's network provides faster delivery of content to your users while reducing serving costs." This document explicitly states the service's purpose aligns with the question's requirements for low latency and global delivery.

2. Google Cloud Documentation, "Set up Cloud CDN with an external backend (internet NEG)": "For content delivery, low latency is paramount... By caching content close to users, Cloud CDN accelerates response times and can reduce the load on your origin servers." This highlights the core benefits of latency reduction and handling traffic spikes.

3. Google Cloud Documentation, "Cloud Storage - Bucket locations": This documentation clarifies that a multi-region bucket "is a geographic area containing two or more geographic places" (e.g., us, eu, asia). This confirms its scope is continental, not globally edge-cached like a CDN.

4. Google Cloud Documentation, "Cloud Filestore overview": "Cloud Filestore is a managed file storage service for applications that require a filesystem interface and a shared filesystem for data." This defines its use case as a backend shared file system, not a web content delivery platform.