MIME - papersocean

Computer Networks:

Physical Layers

Data link Layer(DLL)

Network Layer

Transport Layer:

Session and Presentation Layer:

Application Layer:

Multipurpose internet mail extension (MIME):

The Supplementary protocol allows non ASCII data to be sent through SMTP . MIME is not a mail protocol and cannot replace SMTP ,it is only an extension to SMTP.

MIME Defined by IETF to allow transmission of non ASCII data via Email.
It allow arbitary Data to be and got it in a ASCII for normal transmission.
All media types that are sent or gotten over the internet (www) are encoded utilizing different Emulate types.
Messages sent using MIME encoding includes information that describe the type of data and the encoding that was used.
RFC822 specifies that exact format for email header Line as well as their semantic interpretation.

Working of MIME:

MIME define 5 headers:

MIME version.
Content type
content transfer Encoding.
content ID
content description.

Mail message header:

From: Contact@bitstudies.com
To: rupali@content.edu.
MME Version 1.0

content type: image / GIF

content transfer encoding: base 64.

MIME type in subtype::

Each MIME content must contain two identifiers:

Content type
Content subtype

There are 7 standardized content type that can appear in MIME content type declaration

Type	Subtype	Description
Text	Plain	Unformatted text
Multipart	Mixed	Body content order part of different data type.
	Parallel	some as above but no order
	Digest	Similar to mixed but the default is message.
	Alternative	parts are different variant of a similar message.
Video	MPEG	Video is in MPEG format
Audio	basic	Single channel encoded of voice at 8 kilo Hertz
Image	JPEG	Image is in JPEG format
	Gif	Image is in gif
Message	partial and external body	An entire email message or and external reference to a message