COMPUTER NETWORKING

APPLICATION LAYER

CLIENT SERVER PARADIGM

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which email protocol allows an email client to read mail stored on the mail server?
A
IMAP4
B
SMTP
C
TCP
D
POP3
Explanation: 

Detailed explanation-1: -Internet Message Access Protocol, or IMAP, is a standard email retrieval (incoming) protocol. It stores email messages on a mail server and enables the recipient to view and manipulate them as though they were stored locally on their device(s).

Detailed explanation-2: -(Internet Message Access Protocol 4) A programming interface (API) from the IETF that enables a user’s email program to access the mail server (RFC 3501 standard). Email clients such as Outlook, Mail, Eudora and Thunderbird are typically configured to retrieve mail either via IMAP4 or POP3, the other popular standard.

Detailed explanation-3: -IMAP (Internet Message Access Protocol) is a standard protocol used by an email client for accessing emails that are stored on a remote mail server. Email clients which use IMAP can use either port 143 to establish a non-secured connection, or port 993 if they require to connect securely via IMAP over SSL (IMAPS).

Detailed explanation-4: -IMAP4 is the latest version of the enhanced IMAP standard. Emails downloaded by a client using the POP3 protocol are also deleted from the server when they are deleted in the mailbox. However, when e-mails downloaded with IMAP4 are deleted from the mailbox, they are not deleted from the mail server.

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