Initially, this is in the form of commands. When a file transfer client makes a connection to a port that a file transfer service is listening on, they can then exchange information.
These services have been assigned a standard port by the Internet Assigned Numbers Authority (IANA). The first 1024 ports are reserved for known special services. For common services, there is an expected, set port that the application should be using. When a service that can accept some remote connection (like an FTP server) starts up, it starts “listening” on a specific port. How Are Ports Used With File Transfer Protocols? IP addresses are unique on the internet to the one server they are assigned to, but ports are a fixed range of numbers from 0 to 65535 that each server uses. While that IP address identifies a particular server, ports are numbers that are used at a lower level to specify what application or service on the server you are trying to communicate with. To connect to a specific server, you need to know that server’s IP address. Ports allow the connection and transfer of data to happen between your computer and a server.
In terms of FTP, ports are communication endpoints. Successful file transfers can only happen when the correct ports are open. When using file transfer protocol, you may want to be aware of the different elements involved.
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