
ASSURANCE
At present, routers have been widely used in various industries, and various grades of products have become the main force for realizing various internal backbone connections, backbone interconnections, and backbone networks and Internet interconnection services. The main difference between a route and a switch is that the switch occurs at the second layer (data link layer) of the OSI reference model, and the route occurs at the third layer, the network layer. This difference determines that routing and switches need to use different control information in the process of moving information, so the way they implement their respective functions is different.
A router, also known as a gateway, is used to connect multiple logically separate networks. A logical network is a single network or a subnet. When data is transferred from one subnet to another, it can be done through the routing function of the router. Therefore, the router has the function of judging the network address and selecting the IP path. It can establish a flexible connection in a multi-network interconnection environment, and can connect various subnets by completely different data packets and media access methods, and the router only accepts the source station or The information of other routers is an interconnected device at the network layer.