5. The basic structure of the switch or router hardware can distinguish which types of messages are sent to the CPU for processing and which are not used.

Generally speaking, all CPUs are composed of countless switches, one is 1 and the other is 0. All computer languages are composed of 0 1, so no matter what type of CPU it is, it can be recognized by CPU.

On the backbone network, the main function of the router is to select the route. Routers on the backbone network must know the path to all subordinate networks. This requires maintaining a huge routing table and responding to changes in connection status as soon as possible. The failure of the router will lead to serious information transmission problems.

In local area network, the main function of router is network connection and routing, that is, connecting the lower-level basic network unit-campus network, and being responsible for data forwarding between lower-level networks.

Extended data:

According to the needs of information transmission at both ends of communication, switching is the general term of technology that the information to be transmitted is sent to the corresponding qualified route by manual or automatic equipment. Switches can be divided into WAN switches and lan switches according to their working positions.

Wide area switch is a kind of equipment that completes information exchange function in communication system, which is applied to data link layer. The switch has multiple ports, each of which has a bridging function, and can be connected to a local area network or a high-performance server or workstation. In fact, switches are sometimes called multiport bridges.

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