When configuring a company's network firewall, which port should be open to ensure that employees can access their email via the Internet Mail Access Protocol (IMAP)?
993
995
110
143
The correct answer is port 143, which is the default port for the Internet Mail Access Protocol (IMAP). Port 110 is the default port for Post Office Protocol 3 (POP3), a different email retrieval protocol. Ports 993 and 995 are the secure versions of IMAP (IMAPS) and POP3 (POP3S) respectively, which use SSL/TLS encryption. While using secure ports is a best practice, the question specifically asks for the standard IMAP port, which is listed on the CompTIA A+ objectives.
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