Which feature enables cross-region network connectivity?

Cloud Enterprise Network (CEN) provides enterprise-grade, high-speed, and low-latency network interconnectivity. It enables seamless cross-region inter-VPC communication as well as connection between Virtual Private Clouds (VPCs) and on-premises data centers over Alibaba Cloud's global private network backbones.

A. VSwitch is a subnet-level virtual network switch used to connect cloud instances within a specific Availability Zone inside a single VPC.
C. RAM (Resource Access Management) is an identity management service for user authentication and authorization control, not networking.
D. OSS is a storage service designed for storing unstructured objects and files, offering no networking or routing functionality.

- Alibaba Cloud Documentation: "What is Cloud Enterprise Network?", CEN Product Overview, Doc ID: docdetail/64614.html

- Alibaba Cloud Networking Architecture: "Cross-Region Enterprise Networking with CEN", Solution Blueprint, 2023.