Which three types of firewall filters are supported by Juniper Networks EX Series Ethernet switches?

In the context of Juniper Networks EX Series Ethernet switches, the selection of a router-based firewall filter applied to Layer 3 routed interfaces is accurate because these filters are specifically designed to operate on traffic that is processed at Layer 3, allowing for more complex traffic management and control than a Layer 2 configuration.

Layer 3 firewall filters can perform functions such as permitting or denying packets based on IP addresses, protocols, and port numbers, which is essential for managing routed traffic in environments where different IP subnets are in use. This functionality is crucial for securing the data traversing routed interfaces, as it ensures that only desired traffic types are allowed through, enhancing overall security and performance.

Other choices might involve VLANs or Layer 2 configurations, but they do not provide the same level of granularity and control that a Layer 3 filter offers for routed interfaces, which is why they are not the correct answer in this scenario. The emphasis on Layer 3 indicates a focus on the routing aspect of the network, which is significant for implementing routing policies and maintaining network integrity.