Application of multiuser listening system to virtual remote surveillance system

Multiuser listening system with which Cisco Packet Tracer is equipped, should have played an important role of connecting real network devices such as routers and switches and imaginary network devices such as realized on PCs, each of which installs Cisco Packet Tracer. Unfortunately, since the connection between real network devices and imaginary network ones has not been realized yet, Cisco systems has developed some other imaginary ICT laboratories as a cloud service, which is called Virtual Information Routing Laboratory. This is the reason why Cisco Systems thought that more technical development of multiuser listening system would not be utilized by the network administrators. Though multiuser listening system enables respective imaginary network devices to be activated on respective real PCs, the construction policy of this system is based on peer-to-peer connection . Therefore, there remain several problems to be revised, some of which are stated as the following: <li> The problem asking whether or not more than two PCs can be connected with one another on multiuser listening systems simultaneously, because the original version of this system used to be based on peer-to-peer connection. </li> <li> The problem asking whether or not two PCs whose network segments are separated from each other can be connected on multiuser listening system, because the original version of this system used to be based on the condition that all PCs should share one network segment with one another. </li> In the former part of this paper, we discuss the way of constructing the virtual remote surveillance system consisting of two imaginary network devices which are called virtual remote surveillance suites, with the multiuser listening system. Since it is known that there exist two ways of expanding the original version, in the latter half, we discuss the problem asking whether or not the original first version can be expanded as the following: <li> How to expand the group of virtual remote surveillance suites from two suites to more than two. </li> <li> How to expand the geographical area where virtual remote surveillance suites exist from one network segment to multiple network ones. </li>