Which of the following ports are used for electronic mail protocols? (Choose three.)
A.
23 B.
25 C.
110 D.
123 E.
143 F.
161 G.
389 H.
443
BCE.
Which of the following ports are used for electronic mail protocols? (Choose three.)
A.
23
B.
25
C.
110
D.
123
E.
143
F.
161
G.
389
H.
443
BCE.
The correct answer is B, C, and E. Ports 25, 110, and 143 are used for email protocols.
Here's a brief explanation of each port:
Port 25 - Simple Mail Transfer Protocol (SMTP): This is the most commonly used port for sending email messages. SMTP is a protocol used to send emails from one server to another over the internet.
Port 110 - Post Office Protocol version 3 (POP3): POP3 is a protocol used to retrieve emails from a remote server. Port 110 is used by email clients like Outlook, Thunderbird, or Apple Mail to retrieve email messages from the server.
Port 143 - Internet Message Access Protocol (IMAP): IMAP is a protocol used to retrieve email messages from a remote server. Unlike POP3, IMAP allows users to access and manage their email messages from multiple devices, and it stores the messages on the server.
The other ports mentioned in the question are used for different purposes: Port 23 - Telnet protocol Port 123 - Network Time Protocol (NTP) Port 161 - Simple Network Management Protocol (SNMP) Port 389 - Lightweight Directory Access Protocol (LDAP) Port 443 - HTTP Secure (HTTPS)
It's important to remember the most common ports used for various network protocols when preparing for the CompTIA Network+ exam.