Which of the following does not belong to the block encryption algorithm in the symmetric encryption algorithm?

Administrators want to know the current session table. Which of the following order is correct?

The preservation of electronic evidence is directly related to the legal effect of evidence, and its authenticity and reliability can only be guaranteed if it conforms to legal procedures. Which of the following is not an evidence preservation technique?

Which of the following types of attacks are DDos attacks?

If the administrator uses the default default authentication domain to authenticate the user, the user only needs to enter the user name when logging in; if the administrator uses the newly created authentication domain to authenticate the user, the user needs to enter "Username@" when logging in. Certified domain name"