What is the default port number for FTP in active mode?

The default port number for FTP (File Transfer Protocol) in active mode is 21. FTP is a standard network protocol used for transferring files between a client and a server on a computer network. In active mode, the FTP server listens on port 21 for incoming connections from clients. Once a connection is established, data transfers (such as uploading or downloading files) occur over a separate port, typically port 20 for active mode. Understanding port numbers is crucial for configuring network services and ensuring proper communication between client and server systems.