In order to apply bandwidth restrictions on a bridged interface, which step is required?

The correct approach to applying bandwidth restrictions on a bridged interface is to use mangle to mark the connections. This step is essential because it allows you to categorize and identify specific traffic flowing through the bridge. By marking connections, you can effectively manage how bandwidth is distributed among different types of traffic or specific users.

When employing connection marking through mangle rules, you create a system where you can later reference these marked connections when defining your bandwidth limitations. This process is vital, as it sets the foundation for further actions like queue definitions that utilize those marks to apply the desired bandwidth restrictions.

This method gives granular control over the traffic flow, ensuring that only the intended types of connections are subject to bandwidth limitations. It serves as a prerequisite for the efficient management of traffic within a bridged environment, allowing for tailored bandwidth management to suit network needs.