Original sentence: Additionally, Bonjour works only in a close range; by default, its messages only reach users of the same link.Bonjour is installed by Apple on a user's computer - often without their prior knowledge or consent - when they download or upgrade iTunes or associated iPod or IPhone services.Bonjour is sometimes misunderstood to make services on a personal computer (for instance, file sharing) available to the public Internet, which could be considered a security risk.Bonjour runs in the background as a user process and absorbs a small amount of system resources in the process.For example, a user can browse a list of nearby computers which share files—Bonjour on these computers has told the user that the service is available—but he or she must still provide a password to access any protected files on these machines.However, given the security ability of the general user, this may represent a significant change in the user's security level.If the services are protected through a means other than obscurity, they will remain protected.In fact, Bonjour does not provide any extra access to services, even on the same local area network (LAN); it merely announces ("advertises") their existence.It can be removed from Windows systems by using the Add/Remove Programs tool in the Control Panel.See also comments below under Microsoft Windows implementation.Thus, the security impact of Bonjour is that advertised services are no longer protected by security through obscurity on the local network