Fortunately, when you choose the Automatic setting, Fetch tries to guess for you based on the name the file was given. It's wise to try retrieving or viewing a file immediately after you put it onto an FTP server to be sure that it transfers back to your machine without error. If it does not, try sending another copy to the server in the mode opposite the one used by Fetch. Disconnecting You should close your session with an FTP server as soon as you are done transferring files. Some FTP archive sites are used by a lot of people, and there's a good chance someone is waiting to make a connection while you're connected to it.
Many sites limit the number of people who can be logged in at the same time.
You may occasionally encounter an FTP server that you can't access unless your computer is registered in the domain name system. If you attempt to use such a server with an unregistered computer, you will receive a message that its domain name cannot be found. If you need to register your computer in the domain name system, ask your network administrator to do it for you, or contact ResNet staff if you're working from a residence hall. If you use FTP over EZ-Remote or Express Lane, or from an CIT Public Computer Lab, then a domain name is automatically assigned to your computer, and you don't have to worry about any of this. Sometimes your attempt to connect to an FTP site will be refused because the system is already serving its maximum number of people.