In a multipart email message, what does the boundary parameter in the Content-Type header signify?

Correct option is B

In a multipart email message, the boundary parameter in the Content-Type header is used to define the boundaries that separate different parts of the message. These boundaries mark the start and end of each individual part, such as text, images, or attachments, within the email. The boundary string ensures that the email client can correctly distinguish between each section of the message.
Important Key Points:
1. Multipart Emails: Multipart emails contain multiple parts (e.g., plain text, HTML, images, or attachments). The boundary parameter separates these parts.
2. Boundary String: The boundary is a unique string that does not appear in the content of the email itself, allowing email clients to distinguish different sections.
3. Correct Parsing: This ensures that email clients can correctly parse and display the different parts of the email.
Knowledge Booster:
· It separates the email's body from the attachments: While the boundary does separate content, it is not specifically between the body and attachments—it marks the start and end of each part, including both body and attachments.
· It defines the length of the email message: This is incorrect. The boundary parameter does not define the message's length; it simply separates parts of the message.
· It limits the file size of each attachment: This is incorrect. The boundary parameter does not limit file size; file size limitations are determined by the email server or client.