A three-homed perimeter network configuration requires what?

A three-homed perimeter network configuration typically involves using a firewall to manage and secure the network's traffic between the internal network and the external internet connections. This configuration allows an organization to connect to the internet through multiple pathways, often for reasons of redundancy and improved load balancing.

In this scenario, the firewall serves as a critical component that filters incoming and outgoing traffic, protecting the internal network from unauthorized access while allowing safe communication with trusted external networks. It essentially acts as a barrier that enforces security policies and monitors the traffic that flows between the three connections, ensuring that only authorized traffic is allowed.

The other aspects of the choice—like routers, multiple internet connections, or separate VLANs—while potentially involved in a broader network design, are not specifically essential to the definition of a three-homed perimeter network. The primary focus in such a configuration is on the firewall as the key element that safeguards the connections and facilitates the proper functioning of the perimeter network.