Interview Question

Technical Solutions Engineer Interview

-San Jose, CA

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What port does ftp use? (That seemed like a trick question because they only wanted one port)

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6 Answers

0

20 and 21 but they only wanted 20.

Anonymous on

1

20 for TCP; 21 on command

Ritesh on

0

In FTP, Port 20 is used for the data whilst port 21 is used for commands

Anonymous on

0

Port numbers 21 and 20 are used for FTP. Port 21 is used to establish the connection between the 2 computers and port 20 to transfer data.

Anonymous on

0

20 (data) & 21 (commands) for regular ftp, 989 (data) & 990 (commands) for ftps. not sure why they want 20 though since the first connection is typically established on 21, unless they're specifically troubleshooting why data isn't being transferred

Anonymous on

0

20 is for ftp and 21 is often used for ftps, i think.

generalCode on

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