The C switch displays the controlling terminal's device identification rather than the user's name. Under UNIX, the user's name is set by the UNIX login, whereas the terminal device is determined by the user's connection to the host. Under Windows, the controlling terminal device name will be the network ID of the workstation (i.e. the machine name or, lacking that, the IP address.) In either case, a suffix one or more suffixes is usually added to distinguish between multiple connections originating from the same device. Examples: