Which of the following options belong to the characteristics of the symmetric encryption algorithm? (Multiple choices)

Data Analysis Technology is to find, match keywords or key phrases, and analyze the correlation of time in data streams or information streams that have been obtained.
Which of the following does not belong to evidence analysis technology?

Which of the following DDoS attack types is an attack?

Using the ___ method of the Web proxy, the virtual gateway will encrypt the real URL that the user wants to access, and can adapt to different terminal types.[fill in the blank]*

When the FW is deployed at the network egress location, if a failure occurs, it will affect the main network business. In order to improve the reliability of the network, two FWs need to be deployed and formed ______