Which protocol commonly uses port 445 for Windows file sharing?

Which protocol commonly uses port 445 for Windows file sharing?

• A. SSH
• B. SMB over TCP
• C. FTP
• D. HTTP

Answer: (B)

Windows file sharing relies on the SMB protocol, which in modern Windows systems runs directly over TCP on port 445. This direct SMB over TCP setup enables sharing folders and printers across the network without the older NetBIOS layer. The other options are different services with different typical ports: SSH uses 22, FTP uses 20/21, and HTTP uses 80 (HTTPS uses 443). So SMB over TCP on port 445 is the standard method for Windows file sharing.

Windows file sharing relies on the SMB protocol, which in modern Windows systems runs directly over TCP on port 445. This direct SMB over TCP setup enables sharing folders and printers across the network without the older NetBIOS layer. The other options are different services with different typical ports: SSH uses 22, FTP uses 20/21, and HTTP uses 80 (HTTPS uses 443). So SMB over TCP on port 445 is the standard method for Windows file sharing.