You are working for a mining company that operates several remote sites throughout the world. These remote sites are often difficult to get to in a timely fashion and the equipment on-site is considered mission critical. After a recent malware attack against the industrial controls systems at a remote mining camp took operations offline for several weeks, the organization has created a new IT security division and assigned you the task of securing operations. In reviewing systems, you have found several challenges. Many of the industrial control systems that are networked are badly outdated and cost tens of thousands to replace. The underlying systems are no longer vendor supported and even if you could apply security patches to them, the cost of bringing down operations for even an hour amounts to hundreds of thousands in lost revenue. Additionally, these remote sites have inadequate network resources to do any active monitoring of the devices. In reviewing these constraints, what solution might you recommend for these remote mining sites