Port 2021 is typically used for the transfer of files between a client and a server using the FTP (File Transfer Protocol) protocol.
Ports those registered with IANA are shown as official ports. The same port number may be unofficialy used by various services or applications. The official usage are listed separately below its usage may change from time to time.
Official
Port | Protocol (TCP/UDP) | Title | Description | Port Type |
Port 2021 | tcp | servexec | REGISTERED PORT | |
Port 2021 | udp | xinuexpansion1 | REGISTERED PORT |
UnOfficial
Unofficialy or sometimes with conflict, the same port may be used by different applications.
Port | Protocol (TCP/UDP) | Description |