Final answer:
The type of network that segments a group of hosts from the regular network is called a VLAN (Virtual Local Area Network). It's used to create isolated networks within the same physical infrastructure for better security and management.
Step-by-step explanation:
If you are instructed to connect a computer to a group of hosts that have been segmented from the regular network, the kind of network you are working with is most likely a VLAN (Virtual Local Area Network). A VLAN allows network administrators to create a virtual network that can be separated and isolated from the rest of the network's resources, despite sharing the same physical infrastructure. This is typically done for purposes like enhancing security, improving traffic management, or separating different departments within an organization.