John   uses an email client application to manage his emails. One day, John opens the email client and tries to retrieve his emails, but encounters an error message stating that the client cannot connect to the mail server. He wants to troubleshoot the issue and determine the appropriate protocol for email retrieval.Which protocol is commonly used for email retrieval in the scenario described above?Answer( Please choose a correct answer )   CLEARFTPSMTPPOP3IMAP

Which of the following protocols is used by an email client to retrieve messages from an email server and gives users the option to keep mail messages on the server?answerPOP3IMAPNTPSMTP

What protocol is used to send email messages from a mail client to a mail server?answerFTPSMTPPOP3IMAPSNMP

Which of these is an email-related protocol?MGCPSMTPRDPSFTP

Which is the protocol used to send email?FTPRSYNCHTTPSMTP

Which of the following protocols is used to send e-mail to a server?Group of answer choicesSMTPFTPHTTPSSL