CREST Practitioner Security Analyst (CPSA) Practice

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Which of the following ports is used by the Internet Message Access Protocol?

Port 143
Port 80
Port 25
Port 110

The correct answer is: Port 143

The Internet Message Access Protocol (IMAP) is commonly used for retrieving emails from a mail server. The standard port for IMAP is 143, which allows for communication between the email client and the server to access and manipulate email messages. This protocol supports multiple features, such as the ability to check for new messages without downloading them, which is particularly useful for users who want to manage their emails without having to move them to local storage. The other ports listed serve different purposes: Port 80 is primarily used for HTTP, the protocol for transferring web pages on the internet; Port 25 is used for Simple Mail Transfer Protocol (SMTP), which is responsible for sending emails; and Port 110 is used for Post Office Protocol (POP3), another method for retrieving emails, but it operates differently compared to IMAP. Thus, Port 143 is the correct choice as it directly corresponds to the protocol in question.