What is typically the role of a core router?

The role of a core router is primarily focused on connecting multiple high-capacity networks, which is why this choice is the correct one. Core routers are designed to operate within the backbone of the network, facilitating the efficient transfer of data between various parts of a large network infrastructure. They are equipped to handle significantly higher traffic loads than routers used in smaller networks.

Core routers function at a high-speed, dealing with large amounts of data traffic and are positioned to interconnect with other core routers, forming a web of reliable and high-throughput connections that maintain the network's integrity and performance. This capability is essential for managing the data routes between different autonomous systems within the Internet or between large organizational networks.

The other roles mentioned are handled by different types of routers; for instance, end-user devices typically connect through access routers, while gateways are generally managed by border routers. Local network filtering is usually the responsibility of edge routers or firewalls, which focus on securing and controlling access to local network segments.