Which of the following protocols allows an e-mail client to access e-mails that are stored on a remote mail server?

Question

Options

• APPPoE
• BIMAP
• CSMTP
• DICMP

• A
  12% (6)
• B
  79% (41)
• C
  4% (2)
• D
  6% (3)

Explanation

IMAP stands for Internet Message Access Protocol. This protocol helps to retrieve e-mail messages stored on a shared e-mail server. Through this protocol, a user can use a client e-mail program/Mail User Agent (MUA) for downloading an e-mail from the shared server. A user can also use this protocol to edit or delete an e-mail from the shared e-mail server. An example of the IMAP protocol is the POP3 protocol that is quite simple and used for retrieving e-mails from a Answer option C is incorrect. Simple Mail Transfer Protocol (SMTP) is a protocol for sending e- mail messages between servers. E-mailing systems use this protocol to send mails over the SMTP works on the application layer of the TCP/IP or OSI reference model. The SMTP client typically initiates a Transmission Control Protocol (TCP) connection to the SMTP server on the well-known port designated for SMTP, port number 25. However, e-mail clients require POP or IMAP to retrieve mails from e-mail servers. Answer option A is incorrect. Point to Point Protocol (PPPoE) is a specification for establishing PPP connections through Ethernet network adapters. It connects users on an Ethernet to the Internet through a common broadband medium, such as a single DSL line or cable modem. PPPoE is described in RFC 2516. Answer option D is incorrect. Internet Control Message Protocol (ICMP) is a maintenance protocol and is normally considered part of the IP layer. ICMP messages are encapsulated within IP datagrams, so that they can be routed throughout an internetwork.

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