Describe MIME?

Describe MIME Electronic mail has a simple structure. It can send messages only in NVT 7-bit ASCII format. It cannot be used for those languages that are not supported by 7-bit ASCII characters so languages such as French, German, Hebrew, Russian, Chinese etc cannot use this format. Also, it cannot be used to send binary files or video or audio data. We need a protocol that allows non-ASCII data to be sent through e-mail. So Multipurpose  Internet Mail Extensions (MIME) is the answer. MIME transforms non-ASCII data at the sender site to NVT (Network Virtual Terminal) ASCII data and delivers them to the client MTA to be sent through the Internet. The message at the receiving side is transformed back to the original data. Main task of MIME is to transform non-ASCII data to ASCII data and vice versa. MIME header Multipurpose Internet Mail Extensions defines five types of header.

SMTP is push protocol Justify your answer. SMTP is a push protocol; it pushes the message from the client to the server. For sending email SMTP is used two times, between the sender and the sender's mail server and between the two mail servers. To send mail, a system must have the client MTA (Message transfer agents), and to receive mail, a system must have a server MTA. SMTP uses commands and responses to transfer messages between an MTA client and an MTA server. Commands are sent from the client to the server and Responses are sent from the server to the client. SMTP is not used in pulling the message.