What protocol(s) is(are) allowed a user to retrieve her/his mail from the mail server to her/his mail reader? A. POP3 B. FTP C. MAP D. All of the above E. None of the above

POP3
FTP
MAP
All of the above E. None of the above

The correct answer is: A. POP3

POP3 (Post Office Protocol version 3) is a standard Internet protocol that allows users to retrieve email from a remote server. It is a simple, text-based protocol that is supported by most email clients.

FTP (File Transfer Protocol) is a standard Internet protocol that allows users to transfer files between two computers. It is a more complex protocol than POP3 and is not typically used for email retrieval.

MAP (Mail Access Protocol) is a proprietary protocol developed by Microsoft for accessing email from Exchange Server. It is not a standard protocol and is not supported by most email clients.

Therefore, the only protocol that allows a user to retrieve her/his mail from the mail server to her/his mail reader is POP3.