You can connect to an FTP server using one of three transfer modes, which are common to all the different file transfer protocol software products in cyberspace. Each mode has a slightly different way of initializing the data stream which allows the actual file transfer to take place.

In active mode , the user connects to the FTP server using a dynamic port. A dynamic port is set up to faciliate client-end communication in a client-server connection. After listening for this connection to be established, the file transfer protocol client is then bound to a source port and data transfer is initiated.

Other software allows you to connect in passive mode, which still uses dynamic ports but initiates connections and client-server communications slightly differently. In passive mode, the source end of the transfer also runs through a dynamic port (unlike active mode). This mode can be initiated by entering the command “PASV” into your software’s dialogue box or user interface.

Extended passive mode is virtually identical, except that it does not break the port number down into high bytes and low bytes the way both active and passive modes do. Firewall, connection and transfer interruption problems are most often experienced by users connecting to FTP servers in extended passive mode.

An FTP Server Alternative With Free Transmission and Storage Capabilities

All three of these modes can create problems for the end user, but FTP sites has developed a powerful alternative that makes file sharing faster, easier, safer and more reliable. The FTP system allows you to send extremeley large files for free and offers dedicated online storage space where you can manage and organize your uploads and downloads with unprecedented ease.

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