21Vianet Group, Inc. is a holding company. The Company is a carrier-neutral Internet data center services provider in the People�s Republic of China. Its hosting and related services include managed hosting service, which dedicate data center space to house its customers' servers; interconnectivity services, which allows customers to connect their servers with Internet backbones in the People�s Republic of China and other networks through its Border Gateway Protocol network; CDN Services, or content delivery network services; Cloud Infrastructure Services, also known as infrastructure as a service; and value-added services, which include firewall services, server load balancing, data backup and recovery, data center management, server management, and backup server services. In September 2012, it acquired Fastweb International Holdings.