industrial 4g routers with ethernet and switches

Computer networks are often interconnected by many different types of networks. If several computer networks are only physically connected together and they cannot communicate with each other, then this "interconnection" has no practical meaning. Therefore, when talking about "interconnection", it has been implied that these interconnected computers can communicate, that is to say, functionally and logically, these computer networks have formed a large computer network, or It is called the Internet, and can also be referred to as the Internet or the Internet for short. Some intermediate devices (or intermediate systems) are used to connect networks to each other. ISO terminology is called a relay system. According to the level of the relay system, there can be the following five types of relay systems:

⒈) The physical layer (that is, the first layer, layer L1 often said) relay system, that is, repeater.

⒉) The data link layer (that is, the second layer, layer L2), that is, the bridge or bridge.

⒊) The network layer (layer 3, layer L3) relay system, that is, router.

⒋) A mixture of bridges and routers. The bridge (brouter) has the functions of both a bridge and a router.

⒌) The relay system above the network layer is the gateway.

You can think that the switch can connect multiple computers, and the computers interconnected with the switch have the function of communicating with each other, forming an internal local area network, but it needs network support to access the Internet, so the switch needs Connect to the router, the router can realize the switching function, and it can also dial to realize the broadband connection, and the broadband resources are allocated to a switch, so that multiple computers can share the Internet.

In a nutshell, in fact, the industrial 4g router with ethernet has both routing functions, a network relay system, and a switching function. In addition to the WAN port, the other four ports are equivalent to the switching port. The router is used for the connection between WAN and WAN. Packets are forwarded between heterogeneous networks and act on the network layer. Switches are generally used for LAN-WAN connections. Switches are classified as network bridges and are devices at the data link layer. Some switches can also implement layer 3 switching. The function of the router is stronger than the switch, but the price is relatively expensive, and the speed is not as fast as the switch. The above introduction is only the difference between some switches and routers that we commonly use. For some relatively high-end enterprise-level products, especially the third layer switches and routers, the functions are much stronger than those introduced above.