INTRODUCTION
PROTOCOL LAYERING
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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TCP
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HTTP
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UDP
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SMTP
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Detailed explanation-1: -Simple Mail Transfer Protocol (SMTP) SMTP is an application layer protocol that is used to transmit electronic mail. The SMTP sender process uses a randomly assigned TCP port above 1023 to send SMTP messages to the SMTP receiver process that is listening at the well-known TCP port 25.
Detailed explanation-2: -SMTP (Simple Mail Transfer Protocol) is a TCP/IP protocol used in sending and receiving email. SMTP is used most commonly by email clients, including Gmail, Outlook, Apple Mail and Yahoo Mail. SMTP can send and receive email, but email clients typically use a program with SMTP for sending email.
Detailed explanation-3: -Explanation: Telnet, File Transfer Protocol (FTP), and Trivial FTP (TFTP) are all Application layer protocols.