According to an example, a web server receives an access request from one operator network of different operator networks, process the access request, and obtain processing data. The web server determines an output VIP address corresponding to an input VIP address carried in the access request according to a relationship between input VIP addresses and output VIP addresses of VS clusters of the different operator networks, and sends the processing data to a VS cluster indicated by the output VIP address via an internal network. The VS cluster selects one VS, and the VS selected sends the processing data to a user terminal via an external network.