Which of the following iscorrect about firewall IPSec policy?

What is the nature of information security in "Implementation of security monitoring and management of information and information systems to prevent the illegal use of information and information systems"?

The scene of internal users access the internet as shown, the subscriber lineprocesses are:
1. After authentication, USG allow the connection
2. The user input http://1.1.1.1 to access Internet
3. USG push authentication interface. User =? Password =?
4. The user successfully accessed http://1.1.1.1, equipment create Session table.
5. User input User = Password = *** which the following procedure is correct?

Which of the following protection levels are included in the TCSEC standard? (Multiple Choice)

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?