The scenario described is an Evil twin attack, where a malicious access point masquerades as a legitimate one with the same SSID. To prevent such attacks, the best method is for organizations to educate their employees about verifying the legitimacy of Wi-Fi connections and to use a network access control (NAC) solution that requires authentication before connecting to the company's networks. While changing SSIDs frequently and implementing strong encryption can be helpful, they don't directly address the impersonation of the network, which is the main method of attack in this scenario.