Which port or ports are used for SMTP? Which port or ports are used for SMTP? Which port or ports are used for SMTP? A.20 and 21 B.25 C.53 D.161 and 162 Explanation: SMTP uses port 25.Incorrect Answers:A: 20 and 21 are used for FTP.C: 53 is used for DNSD: 161 and 162 are used for SNMP1D0-470 Show Hint ← Previous question Next question →