COMPUTER THREATS SECURITY
TYPES OF NETWORK SECURITY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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tcp 143
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tcp 21
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tcp 443
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tcp 389
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Detailed explanation-1: -An IMAP server listens on port number 143, while IMAP over Secure Sockets Layer (SSL)/Transport Layer Security is assigned port number 993.
Detailed explanation-2: -IMAP4 server FQDN: mail.contoso.com. TCP port: 993 for always TLS encrypted connections, and 143 for unencrypted connections or opportunistic TLS (STARTTLS) encrypted connections.
Detailed explanation-3: -IMAP is an mail protocol used to access a mailbox on a remote server from a local email client. IMAP can be more complex, but provide more convenience for syncing across multiple devices. Ports used for IMAP: Port 143 – Default IMAP port. Also used for TLS.
Detailed explanation-4: -Imap on port 143 is the newer of the two popular protocols used to retrieve eMail from remote mail servers. (The older protocol, pop3, the Post Office Protocol, uses port 110.)
Detailed explanation-5: -(Internet Message Access Protocol 4) A programming interface (API) from the IETF that enables a user’s email program to access the mail server (RFC 3501 standard). Email clients such as Outlook, Mail, Eudora and Thunderbird are typically configured to retrieve mail either via IMAP4 or POP3, the other popular standard.