Regarding intrusion detection I defense equipment, which of the following statements are correct?

It cannot effectively prevent the virus from spreading from the Internet to the intranet.

The number of applications that NIP6000 can recognize reaches 6000+, which realizes refined application protection, saves export bandwidth, and guarantees key business services

Experience.

Protect the intranet from external attacks, and inhibit malicious flows, such as spyware, worms, etc. from flooding and spreading to the intranet.

Ability to quickly adapt to threat changes