What are the three logical layers of a general web application? (Multiple choice)

When customers use CBR to back up local VMware virtual machines to the cloud, they can use the DES data express service to transfer the first full backup data offline.

A customer needs to run graphics advertising and dyeing services, and needs to perform graphics rendering, video encoding and decoding, etc., which cloud product should be recommended to the customer?

TP99 delay is the minimum time required to satisfy 99% of network requests.

Which of the following features of Linux is used by docoker's resource isolation?