To achieve this it needs the addresses of the computers and where they are on the network hierarchy. This hierarchy is divided into domains or areas of allied users of the network such as countries, education or bradford. The sequence of these numbers is in the order of local computer first, then organisation, area of activity followed by country separated by full stops. Once into this remote computer all its commands and services are available. This command is very similar for DOS and UNIX operating systems.
Access normally uses security measures such as ID and password.
Here many places allow you to login as 'anonymous' and use your Email address as password. Like telnet ftp requires you to specify the address of the machine you would like to exchange files. This is done on the command line prompt. The remote machine will then ask for user name and password and confirms when you are logged in. These commands are similar to the copy command on DOS with the same directory trees and wildcards being possible.