In the construction of information security, the intrusion detection system plays a role as a monitor. Through monitoring the traffic of critical nodes in the information system, it conducts in-depth analysis and explores the security events that are taking place. Which of the following are its characteristics?

Huawei WAF products mainly consist of implementing front-end, back-end central systems and databases. The database mainly stores the front-end detection rules and black and white list configuration files.

Which of the following statements is wrong about the Anti-DDoS cloud cleaning solution?

The virus signature database on the device needs to be continuously upgraded from the security center platform. Which of the following is the URL of the security center platform?

The following commands are configured on the Huawei firewall:
[USG] firewall defend ip-fragment enable
Which of the following situations will be recorded as an attack? (Multiple Choices)