Q26.Marks: +2.0UGC NET Paper 2: Computer Science 26th Nov 2021
In electronic mail, which of the following protocols allows the transfer of multimedia?
1.IMAP
2.SMTP
3.POP3
4.MIME✓ Correct
Solution
IMAP:
Internet Message Access Protocol. It is an application layer protocol which is used to receive the emails from the mail server.
Messages can be accessed across multiple devices and the mail content can be read partially before it is downloaded into the system.
SMTP:
Simple Mail Transfer Protocol. It is an application layer protocol where the client who wants to send the mail opens a TCP connection to the SMTP server and then sends the mail across the connection.
This protocol makes the server to be in an always-on listening mode.
As soon as it listens for a TCP connection from any client, the SMTP process initiates a connection through port 25.
After successfully establishing a TCP connection the client process sends the mail instantly.
POP3:
Post Office Protocol. It is a simple protocol that only allows downloading messages from your Inbox to your local computer.
In POP3 the mail can only be accessed from a single device at a time.
MIME:
Multipurpose Internet Mail Extension. It is a kind of add-on or a supplementary protocol that allows non-ASCII data to be sent through SMTP.
It allows the users to exchange different kinds of data files on the Internet: audio, video, images, application programs as well.
It is just a standard which allows the protocols to transfer multimedia mails.