In computing, it is known as FTP ( File Transfer Protocol ) to a protocol for transferring information between systems connected to a network TCP ( Transmission Control Protocol or that is, Transmission Control Protocol) that is based on the client-server architecture.
In other words, it is a communication protocol or method that allows uploading and downloading files to or from one computer ( server ) to another ( client ), regardless of the operating system that both use. A TCP / IP network layer model is implemented, together with a password or secret key, to establish the remote connection.
Connections through an FTP are designed to be fast, maximizing the information transfer rate, but not secure, since the information (even passwords ) is handled as plain text. For this reason, SCP and SFTP programs are often used to encrypt the content of these connections and prevent access to information by third parties.
This type of technology began to be used in 1971 (known as RFC 114), before the invention of the TCP / IP protocol, and its current version is the one published in 1985 (RFC 959). In general, these types of connections are established using ports 20 and 21 of the system.
What is an FTP for?
FTPs are extremely useful for transferring large amounts of data at a good speed. That is, to send files from one computer to another without the need for removable media (such as compact discs, memory units, etc.), but directly through the Network. This makes it easier to move data, especially if it is a large volume of data, which would require more cumbersome technology.
Nowadays, FTPs share information on editorial, visual or audiovisual work, areas in which voluminous files are usually handled, and work is usually done remotely. Also, in the mobilization of data through medium networks, such as WAN or MAN, these protocols are often used, for example, to upload information to the Internet.
An FTP client is a computer program installed on a user’s computer, allowing him to access a server through FTP protocols to upload or download data from it. In other words, a software that allows the establishment of FTP connections (or SFTP, more secure), once a key and a specific address of the system to which we want to connect, has been provided.
FTP clients usually come pre-installed on operating systems such as Windows, but more advanced programs can also be chosen to switch between different connection modes.
An FTP server is a program designed to run on a computer connected to the Internet, and that fulfills the function of a data provider on a network. This program manages the connections and allows the flow of information to and from the different clients.
They are not usually implemented in personal computers but the repositories of information from large companies or local work networks.
The difference between an FTP client and an FTP server is that the same server can serve many clients since it is the central node for transferring information.