You replaced your Layer 3 switch， which is the default gateway of the end users. Many users cannot access anything now， including email， Internet， and other applications， although other users do not have any issues. All of the applications are hosted in an outsourced data center. In order to fix the problem， which one of these actions should you take？ （）
- A Clear the MAC address table in the switch.
- B Clear the ARP cache in the switch.
- C Clear the ARP cache in the end devices.
- D Clear the ARP cache in the application servers.