Certified Information Systems Security Professional (CISSP) — Question 57

An organization wants to share data securely with their partners via the Internet. Which standard port is typically used to meet this requirement?

Answer options

• A. Setup a server on User Datagram Protocol (UDP) port 69
• B. Setup a server on Transmission Control Protocol (TCP) port 21
• C. Setup a server on Transmission Control Protocol (TCP) port 22
• D. Setup a server on Transmission Control Protocol (TCP) port 80

Correct answer: C

Explanation

The correct answer is C, as TCP port 22 is used for Secure Shell (SSH) and provides a secure way to share data. Option A is incorrect because UDP port 69 is used for Trivial File Transfer Protocol (TFTP), which is not secure. Option B is wrong since TCP port 21 is used for File Transfer Protocol (FTP), which transmits data in plaintext. Option D is also incorrect because TCP port 80 is used for HTTP, which is insecure.