For industrial 4G routers and switches, the main differences are as follows:
(1) Different levels of work
The original switch was working in the data link layer of OSI/RM open architecture, that is, the second layer. Industrial 4G routers
are designed to work in the network layer of the OSI model from the very beginning. Because the switch works in the second layer of OSI (data link layer), its working principle is relatively simple. The industrial 4G router works in the third layer of OSI (network layer), so it can get more protocol information. The industrial 4G router can make more intelligent forwarding decisions.
(2) Data forwarding is based on different objects
Switches use physical addresses or MAC addresses to determine the destination address for forwarding data. Industrial 4G routers use different network ID numbers (i.e. IP addresses) to determine the address of data forwarding. IP addresses are implemented in software, describing the network where the device is located. Sometimes these third-tier addresses are also called protocol addresses or network addresses. MAC addresses are usually hardware-provided, allocated by network card manufacturers, and have been solidified into the network card, which is generally unchangeable. IP addresses are usually allocated automatically by network administrators or systems.
(3) Industrial 4G routers provide firewall services
Industrial 4G routers only forward packets with specific addresses, and do not transmit packets that do not support routing protocols and unknown target network packets, thus preventing broadcast storms.
Switches are generally used for LAN-WAN connections. Switches belong to bridges and are devices in the data link layer. Some switches can also switch in the third layer. Industrial 4G router is used to connect WAN-WAN. It can solve the problem of forwarding packets between heterosexual networks and act on the network layer. They simply receive input packets from one line and forward them to another. These two lines may belong to different networks and adopt different protocols. Comparatively speaking, the function of industrial 4G router is stronger than that of switch, but the speed is relatively slow and the price is expensive.