Community QuestionSeen on 8 CBTs

Simple Mail Transfer Protocol (SMTP)

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Answer

Port 25

4 of 8 indexed CBT versions give this answer·Answer index rebuilt Aug 16, 2026

The indexed versions don't agree on this one

This question appears on 8 CBT versions we've indexed, and they don't all give the same answer. Exam editions change and answer keys get re-cut, so more than one of these was correct on the test it came from. Here is each of them, and how many versions give it.

4 of 8 versionsmost versions

Port 25

Comptia A+ Port Numbers · Comptia Port Numbers · Comptia Ports · +1 more

1 of 8 version

A protocol used to retrieve email from a mail server. POP3 is a later iteration of the POP protocol, and can be used with or without SMTP. Port 110

Comptia A+ Core 1 Study Guide

1 of 8 version

A protocol in the TCP/IP suite designed to send email that uses port 25.

Comptia Fundamentals Study Guide

1 of 8 version

Used to send a receive email across the Internet. This protocol has several-well known vulnerabilities that make it inherently insecure. _________ operates on TCP/ UDP port 25. ________ over SSL/ TLS (SMTPS) uses TCP/ UDP port 465. *Hint: term is the same for all blanks

Tia Cissp

1 of 8 version

Transport mail between mail servers; TCP port 25

When Does Comptia Security+ 601 Expire

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