CREST Practitioner Security Analyst (CPSA) Practice

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Master the CREST Practitioner Security Analyst Exam. Prepare with quizzes and comprehensive study guides that include tips and explanations. Excel in your certification journey!

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Which protocol is associated with port 110?

SMTP
IMAP
POP3
FTP

The correct answer is: POP3

The protocol associated with port 110 is POP3, which stands for Post Office Protocol version 3. POP3 is used primarily for retrieving emails from a mail server. When a client connects to a mail server using POP3, it requests to download emails stored on the server so that the client can read them offline. The importance of port 110 lies in its designation for this specific protocol, making it essential for email retrieval tasks. Unlike other protocols, POP3 allows users to download emails and usually deletes them from the server after retrieval, although some configurations can leave a copy. This is in contrast to other email retrieval protocols like IMAP, which uses a different port (usually port 143 or 993 for secure connections) and maintains emails on the server, thus enabling users to manage their emails across multiple devices. Understanding these protocols and their corresponding ports is crucial for network configurations, troubleshooting connectivity issues, and ensuring the correct setup for email services.