Which protocol provides e-mail facility among different hosts?

Appeared in: AIIMS Raipur - 2017 (shift-2)

Explanation

SMTP, or Simple Mail Transfer Protocol, is the fundamental internet standard for transmitting electronic mail (email).
Its primary role is to 'push' or send emails from a mail client (like Outlook or Gmail) to a mail server.
It is also responsible for relaying the email from the sender's mail server across the internet to the recipient's mail server.
Essentially, SMTP handles the sending and forwarding part of the email journey across different hosts (servers).

Option A: FTP (File Transfer Protocol) is designed exclusively for transferring computer files from one host to another; it does not have the functionality to send or process emails.
Option C: TELNET is a protocol used to provide a command-line interface to communicate with a remote device or server. It is for remote administration, not for sending emails.
Option D: SNMP (Simple Network Management Protocol) is used for collecting information from and configuring network devices like routers, switches, and servers. Its purpose is network administration, not email transmission.

Visual 1: Diagram: A flowchart showing an email's journey. Sender's PC -> SMTP -> Sender's Mail Server -> SMTP -> Recipient's Mail Server -> POP3/IMAP -> Recipient's PC. This visual clearly separates the 'sending' (SMTP) and 'receiving' (POP3/IMAP) stages.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Internet Application Layer Protocols as background academic context rather than a clinical decision trigger.
While this is an IT question, understanding email protocols is relevant in healthcare for ensuring secure communication.
Hospitals and clinics use secure email systems, often layered on top of SMTP, to transmit Protected Health Information (PHI) in a HIPAA-compliant manner.
These systems use encryption to ensure that patient data sent via email remains confidential and secure between hosts.

How to Approach the Question

First, identify the key function required by the question: 'e-mail facility'.
Next, analyze the options provided, which are all acronyms for network protocols.
Recall or deduce the primary purpose of each protocol. SMTP is specifically associated with 'Mail'.
FTP is for 'Files', TELNET is for 'Terminal' access, and SNMP is for 'Network Management'.
Match the required function ('e-mail') with the protocol designed for it. SMTP is the only option directly related to sending mail.
Therefore, select SMTP as the correct answer.

Concept Tested & Keywords

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Practise the full AIIMS Raipur - 2017 (shift-2)

Attempt every question from this paper in a timed mock, then review the full solution for each one.