Pete needs to open ports on the firewall to allow for secure transmission of files. Which of the
following ports should be opened on the firewall?

A.
TCP 23

B.
UDP 69

C.
TCP 22

D.
TCP 21

Explanation:
SSH uses TCP port 22. All protocols encrypted by SSH, including SFTP, SHTTP, SCP, SExec,
and slogin, also use TCP port 22. Secure Copy Protocol (SCP) is a secure file-transfer facility
based on SSH and Remote Copy Protocol (RCP). Secure FTP (SFTP) is a secured alternative to
standard File Transfer Protocol (FTP).