In a collapsed-core architecture, what is a function of the core/distribution layer?

In a collapsed-core architecture, the core and distribution layers are combined into a single layer, typically implemented on one or a pair of high-performance multilayer switches. This design simplifies the network and reduces costs, making it suitable for smaller to medium-sized organizations. The correct option reflects this consolidation, where the combined core/distribution functionality resides on a single device or a redundant pair for high availability. Incorrect options: HSRP is a Layer 3 redundancy protocol, not Layer 2, and while it can be used in IPv6 networks, it's not a defining function of the collapsed core itself. The core and distribution layers are not deployed on two different devices in a collapsed core; they are consolidated. While the router will use IPv4 and IPv6 addresses at Layer 3, this is a general routing function, not specific to the collapsed-core architecture's defining characteristic.