1. A client device comprising: (a) memory configured and arranged to facilitate a connection of the client device with a target device over a secure communication link created based on (i) interception of a request, generated by the client device, to look up an internet protocol (IP) address of the target device based on a domain name associated with the target device, and (ii) a determination as a result of the request that the target device is a device with which a secure communication link can be established; (b) an application program configured and arranged so as to allow participation in audio/video communications with the target device over the secure communication link once the secure communication link is established; and (c) a signal processing configuration arranged to execute the application program.