Regarding the description of the security zone in the Agile Controller-Campus, which of the following...

The user domain is generally composed of various terminal users. The terminals in this area have the characteristics of large numbers, wide distribution, and strong mobility.

The business domain is a platform for the heavy load of business flows. According to the needs of the enterprise, security technology is used to logically divide the business to realize the security of the network.

The network domain is the most concerned security protection area of various enterprises, and it carries the important and core information assets of the enterprise.

The service domain is the area that provides security services for the corporate intranet. This area is generally composed of systems that provide security services such as antivirus servers, patch management servers, and terminal security servers.