Computer network emulation

We consider two examples of network emulation. First is local virtual network realized by emulation environment Virtual Box. Second is done by environment GNS3 with integrated Virtual Box. Here we use virtual computers (servers) and network devices. Some results of virtual network testing by bandwidth measurement tool software iperf are represented. Results of testing of virtual area networks with the same topology realized by environment GNS3 with integrated Virtual Box corresponds to real networks. Here GNS3 studio channel bandwidth and time switching are taken into account. The main parameters of virtual network depend on hardware and software emulation environment. Network emulation provides researching of network device interaction under particular settings and do not require real equipment installation. During emulation once can test different configurations of virtual devices to get optimal hardware and software combination. Computer network platform emulation by special software provides researching of virtual objects over real networks. Therefore, time for installation and settings is reduced both for network and for virtual operating systems. During the network emulation, one of the main problems is estimation of status of communication links in virtual environment and influence of number of virtual objects on to status of virtual links. However great number of virtual objects require high computer resources, that is the main drawback of virtual channels.