The administrator configured file filtering to prohibit internal employees from uploading development files, but internal employees can still upload development files. Which of the following is not possible?

When configure the URL filtering configuration file, www.bt.com is configured in the URL blacklist, and URL is set to *bt.com in the custom URL classification, and the action for customizing the URL classification is warning. .
Which of the following statements is true about the above configuration? (Multiple choices)

With the continuous development of the network and the ever-changing applications, enterprise users have begun to transfer files on the network more and more frequently, and the resulting virus threats are also increasing. Only when the company rejects viruses outside the network can it ensure data security and system stability.
So, which of the following are the possible harms of the virus? (Multiple choices)

Under the CLI command, which of the following commands can be used to view the AV engine and virus database version?

Which of the following options does not pose security threat to the network?