Qus : SMTP protocol works on which port number?
QusSMTP प्रोटोकोल किस Port नंबर पर कार्य करता है ?
A. 80 B. 143
C. 110 D. 25
Solution
D. 25
Explanation
<p><span style="font-size: 14px;">SMTP (Simple Mail Transfer Protocol) is used for sending emails.</span></p><p><span style="font-size: 14px;">The default port for SMTP is 25.</span></p><p><span style="letter-spacing: 0.01rem;">Other commonly used SMTP ports:</span></p><ul><li><span style="font-size: 14px;">587 → Secure email submission (modern standard)</span></li><li><span style="font-size: 14px;">465 → SMTPS (older secure method)</span></li></ul>