Which port in TCP/IP communication is used for Kerberos v5? 06/14/2017 – by Mod_GuideK 0 Which port in TCP/IP communication is used for Kerberos v5? A. 888 B. 86 C. 88 D. 90 SHOW ANSWERSCorrect Answer: C Explanation/Reference: Download Printable PDF. VALID exam to help you PASS.