It is the most common protocol used for exchanging files between computers on the Internet. This example shows two different ways of writing the same address. The first form specifies the login method and gives an explicit instruction to change to the given directory. The second form assumes that anonymous login is allowed and the directory name is tacked on directly after the host name. The host name is the first piece of information given.
Host names are all lower case.
Often the name begins with ftp. Most of the computers you access with ftp will be anonymous file servers. To log in to an anonymous file server, use anonymous as the username, and your e-mail address as the password. It is often used as shorthand when giving ftp addresses. FTP addresses do not always include a directory name.