Not technically a Cell Area Zone but more a dedicated subzone of the Industrial Zone, level 3 site operations consist of all the systems and resources that need to be shared among the production systems in all the Cell Area Zones. Level 3 site operations are the landing zone for interactions with users and systems from level 4 and higher, such as the industrial end of a remote desktop gateway solution or the delivery server for an antivirus update. Systems typically found in level 3 site operations include the following:
- Virtual automation and controls development environments (virtual desktop infrastructure).
- Network and security services for the Industrial Zone, including the following:
- Active Directory
- DNS
- DHCP ...
