Answer:
Network Segmentation
Explanation:
The best technology to implement in this scenario would be Network Segmentation. This allows you to divide a network into various different segments or subnets. Therefore, this allows you to isolate the remediation network from the secure network since each individual subnet that is created acts as its own network. This also allows you to individually implement policies to each one so that not every network has the same access or permissions to specific data, traffic, speeds, etc. This would solve the issues that you are having and add multiple benefits.