CREST Practitioner Security Analyst (CPSA) 2026 – 400 Free Practice Questions to Pass the Exam

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What does SMTP stand for in networking?

Secure Mail Transfer Protocol

Simple Mail Transfer Protocol

SMTP stands for Simple Mail Transfer Protocol. It is a protocol used for the transmission of email messages between servers. Developed in the early days of the internet, SMTP has become a fundamental protocol for sending emails efficiently.

The name "Simple" reflects the basic and straightforward nature of this protocol, as it was designed to be easy to implement and use. SMTP typically operates over TCP/IP, and it allows for the routing of email messages across the internet, from the sender's mail server to the recipient's mail server.

In this context, it is essential to clarify that while other variations, such as Secure Mail Transfer Protocol, are related to email communication, they refer to security protocols or enhancements of SMTP rather than the foundational protocol itself. Hence, Simple Mail Transfer Protocol is the accurate and widely accepted definition of SMTP in networking.

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Standard Mail Transfer Protocol

Service Mail Transfer Protocol

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