Which is the port number of FTP control in plain text?
A.20
B.21
C.25
D.110
- · 有5位网友选择 C,占比50%
- · 有3位网友选择 D,占比30%
- · 有2位网友选择 A,占比20%
A.20
B.21
C.25
D.110
A. metacentric point
B. metacenter
C. metacentric radius
D. tipping center
A、flipped
B、turned
C、made
D、pressed
A、Clients can transfer files but they cannot obtain the contents of a directory.
B、Control messages can be sent as either ASCII text or non-ASCII character.
C、FTP allows each file to have ownership and access restrictions.
D、If the FTP server is running on UNIX and a client on Windows is used to download a binary file, a file format error occurs.
A、OK
B、not found
C、internal error
D、redirection
A、2
B、3
C、4
D、5 or 6
A、HTTP version
B、URL
C、status code
D、status phrase
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