COMPUTER NETWORKING

NETWORK SECURITY

FIREWALLS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
IMAP4 is on port
A
25
B
220
C
143
D
389
Explanation: 

Detailed explanation-1: -An IMAP server typically listens on port number 143. IMAP over SSL/TLS (IMAPS) is assigned the port number 993. Virtually all modern e-mail clients and servers support IMAP, which along with the earlier POP3 (Post Office Protocol) are the two most prevalent standard protocols for email retrieval.

Detailed explanation-2: -By default IMAP works on two ports like POP3: 143 – this is the default port which does not provide any encryption. Port 993 is the secure port for IMAP and it works over TLS/SSL encryption.

Detailed explanation-3: -IMAP (Incoming) 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.

Detailed explanation-4: -Description: Imap protocol is used by eMail clients for the retrieval of their eMail from designated eMail “post office” servers. Email Clients such as Microsoft Outlook, Netscape, Eudora, and many others, using imap protocol to retrieve their eMail, connect to port 143 of a remote eMail server.

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