Which devices can be used to provide network segmentation controls?

Network segmentation involves dividing a network into smaller, manageable sections, which can enhance security by limiting access to sensitive data and systems. Each of the devices listed plays a role in implementing these controls.

Switches can segment networks at the data link layer (Layer 2) by creating VLANs (Virtual Local Area Networks), allowing different segments to communicate with each other only through controlled points. This means traffic can be managed effectively and isolated as needed.

Routers operate at the network layer (Layer 3) and can segment networks by directing traffic between different subnets. They can enforce policies that isolate certain types of traffic or direct it according to defined rules, providing an additional layer of control.

Firewalls act as a barrier between trusted and untrusted networks and can control traffic between the segments at various levels. They can be configured to allow or block traffic based on predetermined security rules, thus enforcing segmentation policies effectively.

Considering the capabilities of switches, routers, and firewalls, it's clear that each of these devices contributes to network segmentation in unique ways. Therefore, utilizing all of them together allows for a more robust and comprehensive approach to implementing network segmentation controls.