Which of the following statements is wrong about VPN?

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

Both A and B communicate data. If an asymmetric encryption algorithm is used for encryption, when A sends data to B, which of the following keys will be used for data encryption?

Which of the following descriptions is wrong about the root CA certificate?

As shown in the figure, a TCP connection is established between client A and server
B. Which of the following two "?" packet numbers should be?