正解:A,B
Answer A,B is correct: A. The two routers share a virtual IP address that is used as the default gateway for devices on the LAN.; B. The two routers negotiate one router as the active router and the other as the standby router. Cloud and virtualization questions require separating physical resources, hypervisor control, virtual switching, server functions, and the service model being consumed. Cisco CCNA 200-301 v1.1 includes this topic under IP Connectivity, so the answer must be validated against normal Cisco device behavior and the operational wording of the scenario. The key is not simply recognizing a familiar acronym; it is identifying what the feature does, where it is configured, and what result it produces. The wrong choices confuse SaaS, PaaS, IaaS, the hypervisor role, or the way virtual machines reach the physical network. In a real network, selecting the wrong option would either leave the feature nonfunctional, create a forwarding or security gap, or send troubleshooting in the wrong direction. The selected answer is the only one that matches the stated requirement and the way Cisco switching, routing, services, security, wireless, or automation functions are expected to operate. This is why the verified answer remains the best technical choice for the question.