Which of the following areFTPThe standard port number of the protocol? (multiple choice)

Use the Ping command on the firewall to test the reachability of the server (the security zone where the server is located is the DMZ). If the security policy is configured to allow the test traffic, the source security zone is ______.

Regarding the description of IP Spoofing, which of the following is wrong?

Which of the following is not a user authentication method in a USG firewall?

Digital certificate technology solves the problem that the owner of the public key cannot be determined in digital signature technology