This service can be likened to physical protection. A security guard makes a round of the premises (patrols) at a fixed frequency to check for any visible irregularities, gates closed/open, lights on/off, etc. In this case, such patrolling of the site is carried out virtually by means of cameras, following agreed instructions and procedures. In addition to virtual patrolling, the operator can control the facilities on-site, such as gates, doors, access control, or even lighting.