FTP i.e file transfer protocol
If using standard FTP protocol then ports 20 and 21 would be used.
80 is HTTP, 25 is SMTP and 20/21 are used for FTP.
Standard FTP ports of 20 and 21
FTP (File Transfer Protocol) uses two TCP ports: port 21 and port 20. Port 21 is used for command control, where commands and responses are exchanged between the client and server. Port 20 is used for data transfer in active mode, where the server connects to the client to send the requested data. In passive mode, data is transferred over a dynamically assigned port above 1024.
In networking FTP uses both ports 21 and 22.
-21
The gestation period for a mouse is generally 20-24 days.
21-20 = 1
20 21/32 is more precise.20 21/32 is more precise.20 21/32 is more precise.20 21/32 is more precise.
21/20 = 100*(21/20)% = (100/20)*21% = 5*21% = 105%
21% of 20.00= 21% * 20= 0.21 * 20= 4.20
21