What technology is used to isolate a group of servers to prevent them from interacting with others?

The technology used to isolate a group of servers to prevent them from interacting with others is VLAN (Virtual Local Area Network). VLANs allow for the logical separation of network segments, enabling devices on the same physical network to be grouped together based on the needs of the organization, regardless of their actual physical location.

By using VLANs, network administrators can create separate broadcast domains, which helps manage traffic and improve security by limiting the interaction between different segments of the network. This means that servers within a VLAN can communicate with each other but are isolated from servers belonging to other VLANs without proper routing or access controls. This isolation helps prevent potential security breaches and minimizes the risk of unauthorized access or data leakage between different departments or services within an organization.

Subnetting, while also a method of dividing networks into smaller segments, does not specifically provide the isolation and security benefits that VLANs offer in terms of logical separation within the same physical infrastructure. A VPN (Virtual Private Network) is used primarily for secure remote access over the internet, and a LAN (Local Area Network) refers to the overall network structure itself and does not inherently provide any isolation mechanisms.