IPS is an intelligent intrusion detection and defense product. It can not only detect the occurrence of intrusions, but also can respond in real time through certain response methods.
Stop the occurrence and development of intrusions, and protect the information system from substantial attacks in real time. According to the description of PS, the following items are wrong?

Which of the following is correct regarding the order of the mail transfer process?
1. The sending PC sends the mail to the specified SMTP server.
2. The sender SMTP Server encapsulates the mail information in the SMTP message and sends it to the receiver SMTP according to the destination address of the mail.
Server.
3. The sender SMTP Server encapsulates the mail information in the SMTP message and sends it to the receiver POP3/MAP Server based on the destination address of the mail.
4. Recipients send emails.

If you combine security defenses with big data technologies, which of the following statements is correct? (Multiple choice)

Regarding the description of keywords, which of the following is correct? (multiple choice)

Network attacks are mainly divided into two categories: single-packet attacks and streaming attacks.
Single-packet attacks include scanning and snooping attacks, malformed packet attacks, and special reports.
Wen attack.