Digital signature is to generate a digital fingerprint by using a hash algorithm to ensure the integrity of data transmission

When configuring user single sign-on, the mode of receiving PC messages is adopted, and the authentication process has the following steps:
1. The visitor's PC executes the login script and sends the user login information to the AD monitor
2. The firewall extracts the corresponding relationship between the user and IP from the login information and adds it to the online user table
3. The AD monitor connects to the AD server to query login user information, and forwards the queried user information to the firewall
4. The visitor logs in to the AD domain, and the AD server returns a login success message to the user and delivers the login script. Which of the following is the correct order?

Regarding the source of electronic evidence, which of the following descriptions is wrong?

About the description of the vulnerability scan, which of the following is wrong?

Which of the following mechanisms are used to implement MAC flooding attacks? (Multiple choice)