A.The firewall has four security zones by default, and the four security zone priorities do not support modification.

B.When data flows between different security zones, the device security check is triggered and the corresponding security policy is implemented.

C.The firewall can create two security zones of the same priority

D.Firewall can have 12 security zones at most.

A.Support multitasking

B.Open source system

C.Support multiple terminal platforms

D.Support graphical interface operations

A.The intrusion detection system can dynamically collect a large amount of key information and materials through the network and computer, and can timely analyze and judge the current state of the entire system environment.

B.The flood detection system can be linked with firewalls and switches to become a powerful "helper" of the firewall, which is better and more precise to control traffic access between domains.

C.The intrusion detection system can perform blocking operation if it finds that there is a violation of the security policy or the system has traces of being attacked.

D.Intrusion detection system includes all hardware and software systems for intrusion detection