Which protocol uses two (2) TCP/IP ports one of them being port 20 for data transfer? 06/14/2017 – by Mod_GuideK 0 CORRECT TEXT Which protocol uses two (2) TCP/IP ports one of them being port 20 for data transfer? A. B. C. D. SHOW ANSWERSCorrect Answer: Explanation/Reference: Answer: FTP Download Printable PDF. VALID exam to help you PASS.