Patent ID: 9565133
Date: 2017-02-07
CPC Classifications: H04L

Claim:
1. A network system including a network constructed by combining a plurality of switching devices, the network system comprising: a first subnetwork and a second subnetwork that is formed outside the first subnetwork, wherein the network is constructed in a train formed with a plurality of vehicles and the subnetworks formed in each of the vehicles include a switching device, a terminal device, and an apparatus connected to a corresponding switching device; and at least one of a switching device in the first subnetwork connected to the second subnetwork and a switching device in the second subnetwork connected to the first subnetwork blocks passage of a broadcast signal that includes a specific logical port number as transmission information, wherein the first subnetwork is a subnetwork provided in a first vehicle, which is an arbitrary vehicle of the plurality of vehicles, and wherein the second subnetwork is a subnetwork provided in a second vehicle coupled to the vehicle in which the first subnetwork is provided.