What can be used in Ethernet to prevent loops in domain paths?

In Ethernet networks, preventing loops in domain paths is a critical aspect of maintaining network stability and integrity. Protocols specifically designed to address network loops, such as the Spanning Tree Protocol (STP), are used effectively for this purpose.

STP operates by creating a loop-free logical topology for Ethernet networks. It detects potential loops and then temporarily blocks certain redundant paths to ensure that there is only one active path between any two network devices at any given time. This mechanism is essential because loops can lead to broadcast storms, which can overwhelm the network and degrade performance.

While filters, wires, and routers are important components in network architecture, they do not inherently prevent loops in the same way that protocols like STP do. Filters can limit traffic based on various criteria but do not address the structural issue of loops in the network topology. Wires are simply the physical medium for data transmission, and routers, while they can manage traffic and segment networks, do not specifically function to eliminate loop paths in an Ethernet context as protocols like STP do. Thus, the emphasis on protocols highlights their vital role in loop prevention, making it the correct choice.