Which of the following protocols uses port 21?
A.
Telnet
B.
FTP
C.
HTTP
D.
POP3
Which of the following protocols uses port 21?
Which of the following protocols uses port 21?
Which of the following protocols uses port 21?
Which of the following protocols uses port 21?
A.
Telnet
B.
FTP
C.
HTTP
D.
POP3