... files into and out of the client’s system. This helps guard against accidental file deletion, and allows easier screening of incoming files for viruses. 132 Practical TCP/IP and Ethernet Networking ... this level to the TCP/IP protocol stack. 134 Practical TCP/IP and Ethernet Networking 8.2 File transfer protocol (FTP) File transfer requires a reliable transport mechanism, and therefore TCP ... (<CRLF>) character. Some commands also require parameters. The use of ASCII character sequences for commands allows the user to observe and understand the command flow, and aids the debugging process....