Which types of the following can the encryption technology be divided into? (Multiple Choice)

After a network intrusion event occurs, according to the plan to obtain the identity of the intrusion, the source of the attack and other information, and block the intrusion behavior, which links in the PDRR network security model do the above actions belong to? (Multiple choice)

Which one of the options below belong to the component of the PKI architecture? (Multiple Choice)

Which of the following behavior is needed in the "Check" section in the construction management cycle of the information security system?

In a stateful inspection firewall, when the stateful inspection mechanism is turned on, when the second packet (SYN+ACK) of the three-way handshake arrives at the firewall, if there is no corresponding session table on the firewall, which of the following descriptions is correct?