The correct answer is a service set identifier (SSID) with WPA2 Personal (AES). The SSID is the network name that must be configured on the smart refrigerator to connect it to the correct wireless network. WPA2 Personal with AES is a secure encryption standard that provides a good balance between security and compatibility for most devices; in the case of a corporate environment, it helps prevent unauthorized access while maintaining a strong encryption. An open WiFi network would lack security, making company data vulnerable. A MAC address table is used to direct traffic within a network but does not pertain to the wireless configuration of individual devices. An Ethernet cable would not apply as the question specifies 'wireless network'.