A customer requires that both of the default FTP ports be allowed on the firewall. Which of the following should the technician enable to allow this communication? (Select TWO).

The correct answer is A. TCP/20 C. TCP/21. FTP uses two TCP ports by design: TCP port 21 is the control/command channel (used to establish the session and send commands), and TCP port 20 is the data transfer channel (used in active mode to transfer file data). Both are TCP-based - FTP does not use UDP. TCP/22 is…

Networking

Question

Options

ATCP/20
BUDP/20
CTCP/21
DUDP/21
ETCP/22
FUDP/22

How the community answered

(43 responses)

A
93% (40)
B
5% (2)
E
2% (1)

Explanation

FTP uses two TCP ports by design: TCP port 21 is the control/command channel (used to establish the session and send commands), and TCP port 20 is the data transfer channel (used in active mode to transfer file data). Both are TCP-based - FTP does not use UDP. TCP/22 is SSH/SFTP, which is a different protocol entirely.

Topics

#FTP#port numbers#firewall#TCP/UDP

Community Discussion

No community discussion yet for this question.

Full 220-801 Practice