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File transfer is a generic term for the act of transmitting files over a computer network like the Internet. There are numerous ways and protocols to transfer files over a network. Computers which provide a file transfer service are often called file servers. Depending on the client’s perspective the data transfer is called uploading or downloading. File transfer for the enterprise now increasingly is done with Managed file transfer. There are 2 types of file transfers: Pull-based file transfers where the receiver initiates a file transmission request Push-based file transfers where the sender initiates a file transmission request. File transfer can take place over a variety of levels: Transparent file transfers over network file systems Explicit file transfers from dedicated file transfer services like FTP or HTTP Distributed file transfers over peer-to-peer networks like Bittorent or Gnutella In IBM Systems Network Architecture, LU 6.2 peer-to-peer file transfer programs such as IBM’s Connect:Direct and CA Technologies’ XCOM Data Transport File transfers over instant messaging or LAN messenger File transfers between computers and peripheral devices File transfers over direct modem or serial (null modem) links, such as XMODEM, YMODEM and ZMODEM.