What ports are used for file sharing?

File sharing commonly utilizes several ports, with TCP port 21 being designated for FTP (File Transfer Protocol) and TCP port 22 for SFTP (Secure File Transfer Protocol) and SCP (Secure Copy Protocol). Additionally, TCP port 445 is used for SMB (Server Message Block) in Windows environments. Other ports, like TCP port 137-139, can also be involved in file sharing, especially for older systems using NetBiOS over TCP/IP.