CertiGuide to A+ (A+ 4 Real)  9  Chapter 14: Networks       9  The Internet            9  Internet Application Technologies

Hypertext Transfer Protocol (HTTP) 1 POP3 and IMAP

FTP (File Transfer Protocol) is a protocol that allows files to be uploaded to and downloaded from an FTP server. In the same manner as HTTP, an FTP server and client are required for an FTP session. The client connects directly to the FTP server, and by issuing commands such as “put” and “get”, can send files to and download files from the server. All versions of Windows come with a command line FTP client tool named FTP.EXE. Alternately, several shareware programs offer a GUI interface to make this process easier. The major benefit of FTP is that there are usually no limitations on file size when uploading or downloading. Compared with other methods of file transfer (such as using Email attachments) where an ISP can limit the size of each attachment or email sent, FTP is less restricted and more reliable.

FTP uses ports 20 and 21.

Hypertext Transfer Protocol (HTTP) 1 POP3 and IMAP