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An odd and an even port were reserved for each application layer application or protocol. The standardization of TCP and UDP reduced the need for the use of two simplex ports per application to one duplex port. [1]: 15 There is some confusion over the name, even among the engineers who worked with the ARPANET. [2]
The File Transfer Protocol (FTP) is a standard communication protocol used for the transfer of computer files from a server to a client on a computer network. FTP is built on a client–server model architecture using separate control and data connections between the client and the server. [ 1 ]
An FTP server is computer software consisting of one or more programs that can execute commands given by remote client(s) such as receiving, sending, deleting files, creating or removing directories, etc. The software may run as a software component of a program, as a standalone program or even as one or more processes (in the background).
A packet-switched network transmits data that is divided into units called packets.A packet comprises a header (which describes the packet) and a payload (the data). The Internet is a packet-switched network, and most of the protocols in this list are designed for its protocol stack, the IP protocol suite.
Below is a list of FTP commands that may be sent to a File Transfer Protocol (FTP) server. It includes all commands that are standardized by the Internet Engineering Task Force (IETF) in RFC 959, plus extensions.
Mirror sites are often located in a different geographic region than the original, or upstream site. The purpose of mirrors is to reduce network traffic , improve access speed , ensure availability of the original site for technical [ 2 ] or political reasons, [ 3 ] or provide a real-time backup of the original site.
As well as the stream of bits from a file stored as a single unit in a file system, some may also send relevant metadata such as the filename, file size and timestamp – and even file-system permissions and file attributes. Some examples: FTP is an older cross-platform file transfer protocol [1]
Two separate methods were developed to invoke client security for use with FTP clients: Implicit and Explicit.While the implicit method requires that a Transport Layer Security is established from the beginning of the connection, which in turn breaks the compatibility with non-FTPS-aware clients and servers, the explicit method uses standard FTP protocol commands and replies in order to ...