Routed interfaces are network ports designed to function at Layer 3 (the network layer) of the OSI model, allowing them to execute routing tasks. They can transmit packets based on IP addresses, making routing choices to guide traffic between various networks. Typically, they are set up with an IP address and subnet mask, enabling them to engage in IP routing. Routed interfaces are utilized to link different networks, such as connecting a router to a switch or bridging two routers. They can also be employed in multilayer switches to facilitate routing between Virtual Local Area Networks (VLANs). These interfaces offer enhanced control over traffic management and can support sophisticated routing protocols like Open Shortest Path First (OSPF), Border Gateway Protocol (BGP), and Enhanced Interior Gateway Routing Protocol (EIGRP).