A company deploys a Web application in Huawei Cloud Stack, binds an elastic IP/NAT gateway to communicate with the network outside the cloud, and controls data traffic through security groups and…

A company deploys a Web application in Huawei Cloud Stack, binds an elastic IP/NAT gateway to communicate with the network outside the cloud, and controls data traffic through security groups and network ACLs to ensure the security of the Web application. When traffic surges, in order to ensure Which of the following cloud service combinations is most suitable for the access experience of web applications?