You are designing the wireless networks for the three warehouses. Your design must support the inventory and shipping management solution， and it must meet security requirements. What should you do？（）

• A、Ensure that all wireless networking equipment fully supports the IEE 802.11a， IEEE 802.11b， and IEEE 802.11g wireless networking protocols
• B、Assign a random service set identifier （SSID） to each wireless access point. Disable broadcasting of SSIDs on all wireless access points
• C、Create a firewall to block traffic to any IP address that did not originate from the company’s DHCP servers. Ensure that all wireless access points connect behind this new firewall
• D、Configure a server to use Internet Authentication Service （IAS）. Configure the wireless networking equipment to use the IEEE 802.1x protocol and the IAS server