Portal authentication is recommended for scenarios with high mobility and numerous terminal types, such as shopping malls and supermarkets. MAC address authentication is recommended for dumb terminals that do not support Portal authentication, such as printers, fax machines, and IP phones.
Portal authentication is indeed recommended for scenarios with high mobility and numerous terminal types, such as shopping malls and supermarkets, because it provides an easy-to-use access method that can handle a diverse range of devices. Conversely, MAC address authentication is suitable for devices that do not support Portal authentication, such as printers, fax machines, and IP phones, because these devices often do not have browsers or interfaces to handle Portal authentication. Hence, the correct answer is 'True'.
A is correct