FTP/S uses which of the following TCP ports by default?
A.
20 and 21
B.
139 and 445
C.
443 and 22
D.
989 and 990
Explanation:
FTPS uses ports 989 and 990.
Incorrect Answers:
A: FTP makes use of ports 20 and 21.
B: Port 139 is used by NetBIOS, and port 445 is used by Microsoft-DS.
C: Port 443 is used by HTTPS, and port 22 is used by SSH and SCP.Dulaney, Emmett and Chuck Eastton, CompTIA Security+ Study Guide, 6th Edition, Sybex, Indianapolis,
2014, pp. 81-83
http://en.wikipedia.org/wiki/List_of_TCP_and_UDP_port_numbers