Question

Which service(s), by default, use TCP and UDP port 22? (Choose all that apply)

A. SMTP
B. SSH
C. SCP
D. IMAP

Answer 1

By default, the services that use TCP and UDP port 22 are SSH (Secure Shell) and SCP (Secure Copy Protocol). SMTP and IMAP do not use port 22 by default; they use different ports for communication.

Step-by-step explanation:

The services that, by default, use TCP and UDP port 22 are:

• SSH (Secure Shell)
• SCP (Secure Copy Protocol)

SMTP (Simple Mail Transfer Protocol) typically uses port 25 for non-encrypted communication or port 465/587 for encrypted communication and IMAP (Internet Message Access Protocol) generally uses port 143 for non-encrypted communication or port 993 for encrypted communication. Therefore, neither SMTP nor IMAP uses port 22 by default.

SSH (Secure Shell) is a network protocol used for secure communication between two computers. By default, SSH uses TCP and UDP port 22 for establishing a connection and transmitting data securely. It provides a secure remote login and file transfer capabilities.